He's keeping his campaign vow to cut taxes.
He's stimulating the economy.
He's using the tax cut as an offering to win Republican votes for the stimulus deal—or, if they turn him down, to appear to the country as a reasonable centrist bedeviled by GOP extremists.
He's making the package more appealing to conservative Democrats, whose ranks have swelled in the last two elections, and will have this to take home to their more moderate constituencies in the purple states and districts.
And by packaging the tax cut with other sweeteners in a time of fiscal crisis, Obama may avoid a months-long war (with the media ruthlessly keeping score) with GOP obstructionists over every obscure clause and comma of a stand-alone tax bill.
The key, of course, is to get it done quickly.
And I'm thinking that this puts the ladies from Maine—and maybe our old pals John McCain and Joe Lieberman—in mighty good bargaining positions.