Obama is going to nominate a minority female. Then the Dems will beat up the GOP all summer for denying her a vote. They will be portrayed as racists, and the War On Women meme will be revived.
Either the GOP will cave after taking a sufficient beating in the media, or this will become the bloody shirt that the Dems will use to get the Obama coalition of minorities and
women back out to the polls.
The most recent election put the GOP in power in the senate. That Trumps the last Presidential election.
Better yet, he will nominate a lesbian minority female who lost her partner on 9/11, who has a black mother and Hispanic transgender father who became Muslims. She will also have several adopted siblings, one a Native American, the other Asian.
(The 9/11 thing will help Trump continue his attack on GWB, kind of a twofer.)