PM Note: Politics of Boston Compared to Politics of Newtown, Weiner Back on Twitter

Anthony Weiner, Back on Twitter -. (Michael Falcone)

Marco Rubio is Satirized in Sombrero - Fusion's Jordan Fabian draws our attention to the anti-reform pins that feature Marco Rubio in a sombrero -

FIRST ON ABC: Diane Sawyer to Speak with George W. Bush and Laura Bush in a Special Interview- The 43rd President of the United States George W. Bush and former First Lady Laura Bush will speak first to "ABC World News" anchor Diane Sawyer as they prepare for the opening and dedication of the George W. Bush Presidential Center. Stay tuned for reports from Dallas this week.

The latest on the Boston Bombing investigation is here -

The latest on the new suspected Canadian train plot is here -

US Will Try Suspected American Terrorist on American Soil - How Dzhokhar Tsarnaev will be tried is now a settled matter. He was charged in federal court today. But the decision - emphatically defended by the White House, has unearthed a bramble of moral, political and legal questions.

Lindsey Graham and others want Tsarnaev to be tried as an enemy combatant even though he is an American citizen and the law would seem to prevent it.

More from Sarah Parnass and Mary Bruce -

Politicizing Boston vs. Politicizing Newtown - Senators Tangle on Boston Bombing's Role in Immigration Overhaul- Sunlen Miller details the movement among anti-reform conservatives to use the Boston tragedy as reason to put the brakes on Immigration reform.

That's got pro-reform Democrats crying foul. And it led to a tense moment at the Senate Judiciary committee today when Chuck Grassley shot back that Democrats had done the same thing with Newtown.

"Let no one be so cruel as to try to use the heinous acts of these two young men last week to derail the dreams and futures of millions of hardworking people," said Sen. Patrick Leahy today.

Grassley shot back: "When you propose gun legislation, I didn't accuse you of using the Newtown killings as an excuse," Grassley said by way of comparison. "I don't hear any criticism of people when there's 14 people killed in West, Texas, and demanding - taking advantage of that tragedy to warn about more government action to make sure that fertilizer factories are safe. I think we're taking advantage of an opportunity where once in 25 years we deal with immigration to make sure that every base is covered."

Miller: Grassley jumped in interrupting Schumer a bit later and yelled, "I never said that, I never said that."

The back and forth between Schumer and Grassley continued, with the chairman banging the gavel to interrupt the rather heated debate, underscoring the emotion surrounding not only the response to Boston but the ever-difficult process of immigration overhaul.

And a take from Jordan Fabian -

Jan Brewer Explains Her Opposition to Gang of 8 to ABC's Jim Avila - He asks what her definition of a secure border is… she says, "if the people who live down there, the ranchers and their families," said the border was secure.

NYC Proposes Raising Age for Cigarette Purchases- No one under 21 would be able to buy cigarettes in New York City under a proposal unveiled Monday to make the city the most populous place in America to set the minimum age that high. Extending a decade of moves to crack down on smoking in the nation's largest city, the idea aims to stop young people from developing a habit that remains the leading preventable cause of death here and nationwide, City Council Speaker Christine Quinn said as she announced the plan. Eighty percent of the city's smokers started lighting up before they were 21, officials say. (AP's Jennifer Peltz)

Science Fair - Obama cycles in place to clean water -