And he's expressing confidence in his chances of winning the White House this fall.
The former Massachusetts governor clinched the party nod Tuesday night with a Texas primary victory.
In a post-victory statement, he claims the party has come together after a divisive primary with one goal. He says that's putting what he calls the country's failures of the last three-plus years in the past. He also says he's mindful of the challenges that lie ahead. But he also says he and the country will settle for nothing less than making America prosperous and filled with jobs.