GOP convention speakers to include Rubio, Christie – Mark Preston on the latest

The very blunt and always entertaining Gov. of New Jersey Chris Christie will be the keynote speaker later this month at the Republican National Convention. Christie confirms he's already working on his speech, telling "USA Today" he'll be delivering some "very direct and hard truths" to the American people.

Also, Florida Sen. Marco Rubio is expected to speak on the final night at the convention, playing the important role of introducing the party's presidential nominee Mitt Romney. This comes after rampant speculation that he was going to be Romney's vice presidential nominee.

This morning on "Early Start," CNN political director Mark Preston explains what the choices in speakers at the Republican convention could mean for the race.