Why Trump keeps asking 'Vance or Rubio?'

Marco Rubio is hitting his stride, he’s Trump’s National Security Advisor and his Secretary of State, he’s taken over the White House press briefing, sat down with the Pope and is now in China for Trump’s showdown with President Xi.No wonder speculation is growing that he could be the next Republican presidential nominee, instead of Vice President JD Vance.Today, Geoff Kabaservice from the Niskanen Center think tank on the new political battle in the US.Featured: Geoff Kabaservice, Niskanen Center Vice President for Political Studies