Obama met with Democratic leaders this afternoon to sell them on the plan, and I've been cautioned by multiple sources that the details could change pending their input. It's not an agreement until everyone's in agreement.
President Obama will address the media regarding this agreement at 6:10 tonight. We'll get you more details on the deal when they're available. It's likely to upset a large number of Congressional Democrats, many of whom want the Bush tax cuts benefiting only the wealthiest Americans to expire, and to avoid relitigating this fight ahead of the 2012 election. However, keep in mind that no less a Republican than Rep. Paul Ryan (R-WI) said he didn't expect to see any tax-side stimulus in the next two years. More on how stimulative this measure would be tomorrow.