Vice President JD Vance on Wednesday brushed off President Donald Trump’s habit of polling friends, allies and dinner guests on whether he or Secretary of State Marco Rubio would make a better 2028 Republican presidential nominee, telling reporters at a press conference that Trump was merely joking around. Vance was speaking alongside CMS administrator Dr. Mehmet Oz to detail the administration's latest efforts to combat what they describe as an epidemic of public benefits fraud when he was asked about a Monday incident in which Trump conducted an informal straw poll of whether visiting law enforcement officials and other allies at a White House Rose Garden dinner preferred him or Rubio. “I don't know who's it going to be — Is it going to be JD, is it going to be somebody else? I don't know,” he said. The president then turned to his guests for their views.…