President Trump’s former primary rival Jeb Bush called on a Republican candidate to challenge the president in the 2020 GOP nomination because the party “ought to be a given a choice." "I think someone should run. Just because Republicans ought to be given a choice," said Bush in an interview with former Obama adviser David Axelrod, which is set to air Saturday on CNN. Bush, who served as Florida’s governor from 1999-2007, acknowledged a Republican opponent’s chances of beating Trump in 2020 will be an uphill climb because “he has a strong, loyal base.”