Unsurprisingly, Joshua Green sees a highly favorable situation for Obama now:

To keep the economy afloat, the White House cut the deals it felt it had to. Many, such as Obama’s agreement to extend all of the Bush tax cuts in 2010, were poorly received by Democrats. Now comes the payoff. The expiration of those cuts and the automatic reductions set to take effect at year’s end—the so-called fiscal cliff—mean that Obama and the Democrats can gain a huge source of new revenue by doing nothing at all. Republican priorities are the ones suddenly in peril. The combination of tax increases on the rich, higher capital-gains taxes, and sharp cuts in defense spending have congressional Republicans deeply worried. To mitigate these, they’ll have to bargain.

Despite their post-election tough talk, Republican leaders have dealt themselves a lousy hand. Obama can propose a “middle-class tax cut” for the 98 percent of American households earning less than $250,000 a year—while letting the Bush tax cuts expire for those earning more—and dare the Republicans to block it. If they do, everyone’s taxes will rise on Jan. 1. It’s true that going over the fiscal cliff, as some Democrats believe will happen, would set back the recovery and could eventually cause a recession. But Democratic leaders in Congress believe the public furor would be too intense for Republicans to withstand for long.

Going over the cliff would also weaken the Republicans’ greatest point of leverage: renewing their threat to default on the national debt. Right now, the Treasury expects to hit the debt ceiling in February. But if the cliff can’t be avoided, tax rates will rise and government coffers will swell, delaying the date of default—thus diminishing the Republicans’ advantage. Alice Rivlin, the founding director of the Office of Management and Budget and a senior fellow at the Brookings Institution, says that “as quickly as the IRS began changing the withholding schedule, the date would be pushed back.”