THE HILL: Iran Letter Divides Democrats. “The warning from Democrats to Republican leaders about undermining President Obama’s Iran diplomacy has split party leaders. One hundred and fifty House Democrats wrote a letter to Obama Thursday urging him to exhaust all diplomatic avenues to a nuclear deal before pursuing tougher options like sanctions — a strong indication that Democrats are ready to block any Republican effort rejecting such an agreement. But while top leaders like Reps. Nancy Pelosi (D-Calif.), Jim Clyburn (D-S.C.) and Xavier Becerra (Calif.) endorsed the May 7 letter, Reps. Steny Hoyer (Md.), the minority whip, and Joe Crowley (N.Y.), vice chairman of the Democratic Caucus, did not.”