March to the Zoo - In 1980 the US Fish and Wildlife Service declared the Red Wolf extinct. But they were wrong and yesterday Newt Gingrich tweeted about seeing some howl at an ambulance.

It's either an odd moment in a mercurial campaign or a great kicker.

Karen Travers and Amy Bingham on the one big up and many downs of Newt 2012 - from Tiffany's and Greece to South Carolina to the zoo in Salisbury, Maryland - http://abcn.ws/Hoznc2

Can the SuperPAC save him (again?) - http://abcn.ws/GZe2uO

POLLS: Santorum Penn Problem - Amy Walter notes that while the focus today is on Newt's um, downscaling, it's worth pointing out that Rick Santorum has been losing some serious ground as well. Take a look at the latest polling for the upcoming primaries and you'll see a distinct pattern: Santorum is struggling, even in states where he should have a built in advantage.

Wisconsin: Primary - April 3 - Romney- 39, Santorum 31 (Marquette U.)

Pennsylvania : Primary - April 24 Santorum- 30, Romney 28 (Franklin and Marshall)

Hoodies in the House - Bobby Rush Makes a statement about Trayvon Martin and defies house order - VIDEO - http://abcn.ws/GU4tJI

Hot Mic Reverb - With President Obama Back in the U.S., Boehner Says He's 'Alarmed' By Hot Mic Comments to Medvedev - Jake Tapper had the drop - "Your message also implies you understand such concessions would not be supported by the American people or the Congress.  As you know, the House has passed legislation prohibiting the administration from making any agreements to diminish our missile defense capacity absent congressional authorization or treaty.  This is an imperative upon which we continue to insist."http://abcn.ws/GWcP2J

Lieberman Agrees - "I don't know what the president meant when he said he'd be more flexible. And I do think on the specific question of our missile defense in Europe to protect the United States and our allies, the president really ought to reassure all of us that he's going to stick with the program that we're on now because that program is, in my important, in my opinion, is critically important to the security of the American people for years and years to come."

Mad Men - A recent video put Obama in the Mad Men credits. Amy Walter, Rick Klein and David Chalian wonder who the other candidates would be. (Hint: Romney is the British guy and Ron Paul doesn't wear socks) - http://yhoo.it/HkJYH9

Romney Recounts Story of Dad's Layoffs - http://abcn.ws/GWNZE8

Final Four is Tearing Mitch McConnell Apart - http://abcn.ws/Ho1mcR

Biden: Thank You, Dr. Pepper - (Sorry, Mr. Pibb)  - http://abcn.ws/GYZHf4

Olympia Snowe - Gives Obama a "Close to Failing" grade on working with Republicans - Time was, the White House was courting her all the time - on stimulus and  health reform. But after being the only Republican to vote for the health reform bill (in committee), she fled. And hasn't met with Obama alone since.

More from Jon Karl's exit interview - "Snowe said that if she had to grade the President on his willingness to work with Republicans, he would "be close to failing on that point."  In fact, Snowe, who was first elected to Congress in 1978, claims that her meetings with President Obama have been less frequent than with any other President…. "

"Sen. Snowe admitted that her party has changed since she entered politics, and that she is a rare moderate in the Republican caucus. That said, she is adamant that her core beliefs are as Republican now as they ever were. "I haven't changed," she said. "I represent what I think is a traditional Republican… a limited government, fiscal responsibility, strong national defense, individual freedom and liberty."" http://yhoo.it/H1aiTe

SCOTUS Obamacare Wrap Up - Ariane de Vogue - After three days and more than 6 hours of arguments, Solicitor General Donald B. Verrilli gave a closing statement of sorts to the justices saying that the Affordable Care Act, "unshackled" those who previously could not afford health care and it helped to "secure the blessings of liberty" for millions of Americans. But Paul D. Clement, the attorney for 26 states challenging the law stood up afterwards and dismissed Verrilli's statement. He said it was a "funny concept of liberty that forces" someone to buy a product they don't want.

Supreme Court Beer Pong Imagined - http://abcn.ws/GU30mM

All Things Obamacare - http://abcn.ws/GHtLzb

Audio - http://abcn.ws/GXfKcG

Transcript - http://abcn.ws/HedilT

Can the Act be Hacked Up or Not? (And Scalia's Not so Subtle Jibe at the "Cornhusker Kickback") http://abcn.ws/GXHuh9

White House Defends Solicitor General Verrilli - http://abcn.ws/GWOqyb

Pelosi Has 'No Idea' What Trial Outcome Will Be - http://abcn.ws/GWcP2K

The Medicaid Question - http://abcn.ws/H1aiTf

Leno Pushed Romney on Pre-Existing Conditions - http://abcn.ws/GYn9MO

Senators Release Resolution Backing "Syrian People," Denouncing Assad - http://abcn.ws/H1wMaJ

Romney Praises Wisc. Governor Ahead of Recall Election - http://abcn.ws/HkK0i9

What's Behind Romney's Republican Doubters? Pollster Gary Langer explains how both religion and ideology play a role in GOP voters' discontent with the leading candidate. http://abcn.ws/HosM14