Frank James

There was a time when Jim DeMint was committed to helping Sen. Marco Rubio achieve his goals.

Not anymore.

At least not when it comes to remaking the nation's immigration laws.

DeMint is president of the conservative-leaning Heritage Foundation, which on Monday released a report contending that an immigration overhaul would cost U.S. taxpayers $6.3 trillion over 13 years in direct and indirect spending like welfare and public schools.

Of the senators who have become lightning rods for voting against expanded criminal background checks for gun buyers, New Hampshire Republican Kelly Ayotte is drawing the most bolts.

Video of Ayotte being questioned by the daughter of the principal killed during the Sandy Hook Elementary School massacre in Newtown, Conn., has gone viral.

Imagine having to deliver a tribute for someone you've openly excoriated for years.

That was essentially the task President Obama had before him Thursday in his speech at the dedication ceremony for former President George W. Bush's Presidential Library and Museum in Dallas.

After the Senate failed to pass bipartisan legislation to expand background checks for gun purchases, the superPAC created by shooting victim and former Rep. Gabrielle Giffords and her husband, onetime astronaut Mark Kelly, vowed to remind voters of which lawmakers voted against the plan.

Blame shifting was in high gear Tuesday on Capitol Hill and at the White House as the first air traffic delays tied to the furloughs of Federal Aviation Administration controllers began to get attention.

The Republicans' message: Delays at some airports this week — a result of automatic spending cuts known as the sequester that took effect in March, but whose resulting furloughs are just kicking in — was a "manufactured crisis," and that the administration wants voters angry enough to force Congress to give President Obama the higher taxes he seeks.

No sooner did the first reports emerge that the suspects in the Boston Marathon bombings were Chechen immigrants than did that fact intrude into Washington's debate on immigration.

Opponents of immigration reform seized on the fact to raise doubts about efforts to change immigration laws to, in part, bring the estimated 12 million people now in the U.S. illegally out of limbo.

Sen. Joe Manchin, the West Virginia Democrat who lent his name to bipartisan legislation that would have extended background checks for gun purchasers to gun shows and online sales, isn't letting go.

At least not yet.

To Manchin, the bipartisan compromise he co-sponsored with Sen. Pat Toomey, a Pennsylvania Republican of consistent conservative credentials, fell victim to a steady stream of misinformation spread by some gun rights absolutists, including the National Rifle Association.

The Senate's rejection of more robust gun purchase background checks was a stinging blow to President Obama that raised questions about his second-term agenda.

Expanding background checks had become a key part of Obama's post-Newtown push for tougher federal gun control laws. And in recent weeks, the president had campaigned for overall gun control legislation — especially the bipartisan background-check compromise — with a sense of urgency.

On Monday, CNN's Wolf Blitzer and some others made a point of highlighting President Obama's failure to use the words "terror" or "terrorism" in his first remarks following the Boston Marathon bombings.

The Senate was due on Tuesday to take up legislation embodying the bipartisan compromise reached by two senators, West Virginia Democrat Joe Manchin and Pennsylvania Republican Pat Toomey.

The effort to extend background checks to weapons purchases at gun shows and online received a boost over the weekend when an important gun rights group, the Citizens Committee for the Right to Keep and Bear Arms, announced its support for the measure.