On the evening of Sept. 10 in Dallas at the Republican midterm convention, U.S.
Vice President Vance was interrupted by protesters waving a Mexican flag. U.S.
media said the action targeted the administration’s hardline immigration policy.
Protesters chanted "48", implying Vance could be a 2028 presidential contender;
Trump has not indicated he would back a successor. Republicans broadly speculate
Vance or Secretary of State Rubio could lead the party after Trump.