Vice President JD Vance cheered on by audience at GOP midterms convention as Secretary of State Marco Rubio appears to back away from White House challenge

Ahead of November midterms, some GOP faithful say VP is natural choice, while others look to president's former challengers as leader in 2028; Trump hasn't endorsed a successor

JD Vance delivered a nationalistic speech at the Republican Dallas convention, testing his 2028 White House prospects. He emphasized an "American birthright" and criticized…