Republican lawmakers on the fence about backing House Speaker John Boehner's debt-ceiling plan are on his last nerve. In a closed-door meeting on Wednesday morning, he ordered them to "get your ass in line," predicting that Senate Dems will give in if he can push his proposal through the House. "I can't do this job unless you're behind me," he said. He certainly has House Majority Leader Eric Cantor (R-Va.) behind him; Cantor told other GOP members to "quit whining" and support Boehner's two-step plan. Meanwhile, Republicans are calling for the firing of a top staffer who tried to get outside conservative groups to oppose the Boehner plan.