Can Cory Booker save Mary Landrieu's Senate seat?

Louisiana Sen. Mary Landrieu, facing long odds in a runoff election next month and having gone all-in on the Keystone KL pipeline only to have the Senate vote it down earlier this week, has called in some help in the form of New Jersey Sen. Cory Booker:

I’m in Louisiana this weekend campaigning for @MaryLandrieu pic.twitter.com/h3jhKFE5EH

— Cory Booker (@CoryBooker) November 22, 2014

Booker voted “no” on Keystone, but Landrieu will obviously take the help where she can get it.

@CoryBooker You'd be better off to make friends with @BillCassidy. @MaryLandrieu is done.

— Miles Lee Elder (@mlelder) November 22, 2014