Presumptive Democratic Nominee?

May 20, 2008— -- KENTUCKY - Democratic Primary - closed

Polls close: 7:00 PM ET

51 Democratic delegates at stake, proportional

OREGON - Democratic Primary - closed

Polls close: 11:00 PM ET

52 Democratic delegates at stake, proportional

At this writing, Barack Obama is just 18 pledged delegates away from reaching the majority of total pledged delegates, according to the ABC News delegate estimate.

Obama is 110 delegates away from reaching the DNC's magic number of 2026 to secure the Democratic nomination.

Tonight will put him over the pledged delegate majority and likely closer to the magic number, but don't look for any victory speech from the Illinois senator tonight. Mindful of the fact that there are three more primaries on the calendar, that Hillary Clinton shows no signs of dropping out of the race before June 3 and that they don't want to be seen as pushing her off the stage, the Obama campaign has stressed that tonight is a milestone in the nomination process but not the coronation.

"It doesn't mean we declare victory because I won't be the nominee until we have enough, a combination of both pledged delegates and superdelegates to hit the mark," Obama said last weekend, per ABC News' Sunlen Miller. "But what it does mean is that voters have given us the majority of delegates that they can assign. And obviously that is what this primary and caucus process is about."

ABC News Polling Director Gary Langer has the following take on the Kentucky and Oregon preliminary exit poll results: two states and two different voter profiles informing vote preference.

"Working-class whites dominate in Kentucky: In preliminary exit poll results about two-thirds of white voters there lack a college degree, far more than the number across all primaries to date, 49 percent. In Oregon, the voter poll indicates that less-educated whites make up about half of the electorate, again well under their share in Kentucky."

"White voters predominate in both states: African-Americans account for just about one in 10 Kentucky voters in these preliminary results, and fewer in Oregon. Socioeconomic rather than racial differences are prevailing."

"Reflecting criticisms of Obama, nearly half of Kentucky Democratic voters say they would not support him in a November election against John McCain, similar to the result in West Virginia. In Oregon, by contrast, only one in six say they wouldn't vote for Obama against McCain, about as many as say they wouldn't support Clinton as the nominee."

Obama heads back to Iowa tonight, the place where his path to the Democratic nomination began all the way back in January, but don't expect him to declare victory and game over. Obama will be joined by Iowa Democratic Party Chair Scott Brennan who endorsed the Illinois senator in his role as a Hawkeye State superdelegate.

Former President Bill Clinton dismissed the pledged delegate milestone since it does not count Michigan and Florida. "There won't be tonight, unless you decapitate Michigan and Florida, which violates our values and is dumb politics," Bill Clinton said.

Speaking of the Sunshine State…both Obama and Clinton head to Florida tomorrow, campaigning for the first time since the DNC sanctioned the state by stripping it of its delegates for moving its primary up on the calendar.

Obama is there as part of his pivoting to the general election and planning for the November battleground states. Clinton will continue to make her case to have the Florida delegates seated at the convention in Denver in August.

John McCain had a one-day head start in Florida and today he took the opportunity to criticize Obama's position on Cuba. ABC News's Bret Hovell reports that McCain, in Miami to commemorate Cuban independence day, promised that as president he would hasten the demise of the current Cuban regime, refuse to negotiate unconditionally with Raul Castro, and maintain the embargo on the island nation.

"I will not passively await the day when the Cuban people enjoy the blessings of freedom and democracy…" McCain said. "The Cuban people have waited long enough.

He criticized his Democratic opponents for having a different plan on Cuba, singling out Obama for, according to McCain, having once supported the lifting of the U.S. imposed embargo on Cuba, and his willingness to meet with Cuban leader Raul Castro. "These steps would send the worst possible signal to Cuba's dictators -- there is no need to undertake fundamental reforms, they can simply wait for a unilateral change in US policy," McCain said.

In an interview with ABC News' Jake Tapper, Obama called McCain's comments his "typical".

"This is a typical approach of John McCain and that is to distort my record and embrace George Bush's record," Obama said. "The fact is eight years ago John McCain suggested maybe we should lift the embargo and since that time nothing's change."

Superdelegate watch

Obama picked up two new superdelegates today (Iowa Democratic Party Chairman Scott Brennan and Madeleine Bordallo of Guam). Clinton picked up one – Massachusetts Attorney General Martha Coakley.

Where are the candidates tonight?

Obama – Rally in Des Moines, Iowa

Clinton - Rally in Louisville, KY

Keep an eye on…

The Obama and Clinton campaigns releasing their April fundraising total. A McCain spokeswoman tells ABC News' Bret Hovell that McCain raised $18m in April, his best fundraising month.

On the campaign front. . .

BARACK OBAMA

-- 12:00 pm ET: Attends rally with voters, Tampa, FL

HILLARY CLINTON

-- 12:45 pm ET: Attends event with voters, Boca Raton, FL

-- 4:00 pm ET: Attends event with voters, Sunrise, FL

-- 8:00 pm ET: Attends event with voters, Coral Gables, FL

As for the Republicans. . .

JOHN MCCAIN

-- 9:00 pm ET: Attends fundraiser with supporters, Irvine, CA

At the White House and Beyond. . .

PRESIDENT BUSH

-- 11:40 am ET: Meets with the National Commander in Chief of the VFW, Washington, DC

-- 1:45 pm ET: Signs H.R. 493 – Genetic Information Nondiscrimination Act of 2008, Washington, DC

VICE PRESIDENT CHENEY

-- 11:00 am ET: Speaks at the Coast Guard Academy graduation ceremony, New London, CT

POLITICAL NEWS STORIES ON ABCNEWS.COM

ABC News' Gary Langer: Exit Polls: Socioeconomics, Not Race Drives Vote LINK

ABC News' Rick Klein and Ed O'Keefe: Ted Kennedy Diagnosed with Malignant Brain Tumor LINK

ABC News' Jake Tapper: Interview with Barack Obama LINK

ABC News' Bret Hovell and Z. Byron Wolf: Nation Reacts to Kennedy Brain Tumor News LINK

ABC News' Jake Tapper: The Holes in Clinton's "Popular Vote" Argument LINK

ABC News' Russell Goldman: For Some Clinton Supporters, Sexism Is the Only Explanation LINK

ABC News' Jake Tapper: Hillary Sees Sexism in Campaign 2008 LINK

ABC News' Teddy Davis and John Santucci Report: Biden to Clinton: Embrace Obama on June 3 LINK

ABC News' Bret Hovell: McCain Offers Cubans Hard-line on Castros; Criticizes Obama for Willingness to Talk LINK

ABC News' Jake Tapper: Obama in Montana: Republicans Spreading Muslim Rumors About Me LINK

ABC News' Kate Snow and Eloise Harper: President Clinton Acknowledges There Have Been "Moments" of Gender Bias LINK

ABC News' Jake Tapper: What Happens After Obama Claims a Majority of Pledged Delegates Tonight? LINK

ABC News' Jake Tapper: Kentucky Airport LINK

POLITICAL VIDEO ON ABCNEWS.COM

Primary Day Showdown

ABC's Kate Snow talks with the Clinton campaign in Louisville, Kentucky. LINK

Senator Tears Up Over Kennedy

Through emotional tears, Sen. Byrd sends prayers to Kennedy family. LINK

Obama on Kennedy: 'It's Heartbreaking'

Sen. Obama says Kennedy is "not only a giant of the Senate" but a good friend. LINK

Senate Colleagues Send Kennedy Prayers

Reid, Dodd and Kennedy reflect on Kennedy news, adding he's a "strong guy with a great heart." LINK

Kennedy Diagnosed With Brain Tumor

Tests reveal a brain tumor on Senator's brain after he suffers seizure. LINK

McCain Accuses Obama of Cuba Flip-Flop

Sen. McCain continues to hammer Obama on foreign policy during a Miami event. LINK

'View' Rips on Campaign Signs

The ladies discuss the meaning behind presidential candidates' campaign signs. LINK

Sam on Obama's Wife Defense

Sam Donaldson discusses Obama's charge that "folks should lay off" his wife. LINK

'The Note' Rewinds the Week's Best Moments

ABC News' Senior Political Reporter Rick Klein on the weekly political roundup. LINK

End of the Road for Clinton?

Cokie Roberts and strategist Matthew Dowd weighs in on the presidential race. LINK

Gender Matters

Can Barack Obama win over Hillary Clinton's female supporters? LINK

Obama Campaign Confident

Barack Obama hopes to get enough delegates to claim the Democratic nomination. LINK

McCain Seeks Mass Appeal

The candidate tries to attract independent voters without losing GOP support. LINK

Milestone Ahead for Obama

Clinton fights for relevance as Obama is expected to gain delegate majority. LINK

Huckabee Laments Obama Joke

The former presidential candidate says he'll leave joke-telling to comedians. LINK