Why most 2016 candidates are speaking at AIPAC

Tamara Keith of NPR and Stu Rothenberg of the Rothenberg & Gonzales Political Report join Gwen Ifill to discuss the latest in politics, including Hillary Clinton’s remarks to AIPAC, Donald Trump’s meeting with Republicans in Washington, the campaign pivot to the general election race, what to look for in Tuesday’s primary contests and Sen. Elizabeth Warren’s words about Trump on social media.