The anti-trafficking measure is the first step toward a sensible gun-violence package, and the indefatigable Schumer is not giving up on finding additional Republicans to support a strong bill on background checks.
On immigration, former Gov. Jeb Bush showed what happens when the print deadlines for books are out of step with rapid shifts in the political winds. In Immigration Wars, co-authored with Clint Bolick, Bush came out for legalizing the situation of undocumented immigrants, but against giving them a path to citizenship. His book dropped at a moment when leading voices in his party (notably Sen. Marco Rubio, his fellow Florida Republican) have embraced citizenship as a goal.
I hope Secretary of State John Kerry, trashed by a certain Bush brother as a flip-flopper in the 2004 presidential campaign, was entertained by the sight of Jeb Bush's scrambling to adjust himself to new political realities. But let's be charitable and take the younger Bush's evolution as another sign that the ice is breaking in places where it once seemed 30-feet thick.
This is not only a matter of Republicans moving the Democrats' way. Sen. Rand Paul's filibuster against President Obama's drone policy shook philosophical categories in a remarkably healthy way.
On the one side were Sens. John McCain (R., Ariz.) and Lindsey Graham (R., S.C.) staunchly defending Obama. On the other, many liberals praised Paul for opening up a debate we badly need.
It's true that Paul's 13-hour speech came with a large dose of right-wing paranoia, its low point being the Kentucky senator's bizarre suggestion that Obama might call in drone strikes against tea-party members in the United States.
But the administration has invited attack by imposing a level of secrecy on its drone policy that's not consistent with what we have a right to expect in a democracy. Graham admirably chided conservatives for raising questions about Obama that they never raised about George W. Bush. Liberals should reciprocate by holding Obama to the same standards they would invoke if Bush were still president.
Then there was the dinner between the president and a dozen Republican senators to ponder a budget solution. It's been a long time since a group of Republicans said so many gracious things about Obama. My hunch is that this is the beginning of a real negotiation.
The softening of party lines should not be confused with the coming triumph of a timid centrism. On the contrary, the new drone discussion has been driven by an alliance between forces well to both the right and the left of center.
And if Republicans end their intransigence and seek an agreement on the budget, they'll call forth a more vigorous argument from progressives who do not want Obama's desire for a deal to push him toward cuts in retirement programs. A preview was offered by Thomas B. Edsall in a column online for the New York Times last week asking why, for example, we are talking a great deal about cuts in Social Security but not much about increasing the share of their income that wealthy people pay in payroll taxes.
Hope about anything in our politics seems outlandishly risky these days. But we have had a taste of how less rigid partisanship can enliven and add substance to our debates. We might get to like it.
E.J. Dionne is a Washington Post columnist. E-mail him at firstname.lastname@example.org.