Senator John McCain, the presumptive Republican presidential nominee, on Friday is scheduled to meet with two Republican governors who have been prominently mentioned as potential running mates, according to Republicans familiar with Mr. McCain’s plan. Charlie Crist, the governor of Florida, and Bobby Jindal, the governor of Louisiana, have both accepted invitations to meet with Mr. McCain at his home in Arizona, according to Republican familiars with the decision. One Republican said that Mitt Romney, a former rival of Mr. McCain for the presidential nomination — is also expected to visit him this weekend. Mr. Romney’s advisers declined to comment.