Marco Rubio is preparing to go all in to support sweeping immigration legislation, offering himself up as the public face of a bill that will split the Republican Party — but that his allies hope will propel him to the front of the GOP presidential sweepstakes. …

Rubio is planning a media blitz to promote the bill — which is expected to be released early next week — making the rounds on all of the Sunday political talk shows starting this weekend, wooing skeptical conservative radio hosts and pitching the plan to Spanish-language news outlets. The campaign is aimed at building public support for the far-reaching immigration bill that will dominate Capitol Hill’s attention for much of the year.

“Obviously, we’ll be informing the public, and we’ll want everyone to know everything that’s in the bill,” Rubio told POLITICO Thursday. “We want everyone to know as much of what’s in the bill as possible, and we will use every opportunity we have to communicate that.” …

Far from dropping out of the group, as some suspected after his tepid comments recently, Rubio will essentially become its most prominent salesman, effectively putting his political capital — and presidential ambitions — on the line in the process. With momentum behind the push, Rubio clearly has calculated it makes more sense for him to fully embrace the effort, rather than run away from it and potentially kill the measure just as it is introduced.