Brian Beutler at Talking Points Memo says the tax cut fight is on:

Senate Majority Leader Harry Reid has enough votes to pass President Obama’s plan to extend the Bush tax cuts for everyone’s first $250,000 in income, according to his office … if Republicans agree not to filibuster it.

The development positions Democrats and Obama to attack Senate Republicans for blocking extension of nearly all the Bush tax cuts, unless wealthy Americans get their tax cuts extended as well.

This doesn't look very good for Republicans. Are they going to really go to the mat trying to protect Mitt Romney's tax breaks? But then, there's an old saying about Democrats snatching defeat from the jaws of victory, so let's not count this as a win just yet.