WHAT YOU MIGHT HAVE MISSED:
Tension at town hall: The daughter of the Sandy Hook Elementary School principal killed in a mass shooting late last year confronted Sen. Kelly Ayotte (R-N.H.) at a town hall over her vote against expanding background checks.
Christie launching major ad buy: New Jersey Gov. Chris Christie (R) will launch his first TV ad, reportedly backed by an initial $1.5 million buy. Christie is a heavy favorite to win reelection this fall.
Immigration plan can't pass House: Sen. Marco Rubio (R-Fla.) told conservative radio show host Mike Gallagher that the "Gang of Eight" immigration reform proposal he helped craft probably can't pass the GOP-controlled House without tweaks. "It will have to be adjusted, because people are very suspicious about the willingness of the government to enforce the laws now," Rubio said.
Not all publicity is good publicity: A Web site billing itself as a dating site for people already in relationships put up a billboard in South Carolina with a picture of Mark Sanford. Meanwhile, Sen. Rand Paul (R-Ky.) officially endorsed Sanford. So did FreedomWorks.
Keep an eye on Kingston: Rep. Jack Kingston (R-Ga.) has scheduled a pair of news conferences for Thursday, stoking speculation that he will announce a Senate bid.
Cuomo writing book: New York Gov. Andrew Cuomo (D) has a book deal. The book, which will cover his private life and first term as governor, is due out next year.
THE FIX MIX: