Obama’s immediate problem on guns is weak support from Democrats, especially centrists running for reelection next year in conservative or swing states. Defections by Sens. Mark Begich (D-Alaska), Max Baucus (D-Mont.), Kay Hagan (D-N.C.) and Mark Pryor (D-Ark.) during last month’s budget vote shows they will be hard to corral…

Democratic strategists fear if the [immigration] measure strays into July, it will become embroiled in the fight over the debt limit, which Republican leaders say they will use as leverage to extract concessions from Obama on entitlement programs.

“They hope to get something through the Senate by June and then go to the House, certainly by the end of June if not earlier than that,” said Mike Lux, a Democratic strategist.

He said a July debate on immigration reform “would bump into the debt-limit fight and it would be a problem.