Trump's Staff Warned Him Off Ukraine Conspiracy
President Trump recently said he believed that Ukraine was responsible for hacking the 2016 election.
Former administration officials told The NY Times that they warned the president about that theory.
They said the accusations were groundless and the theory was debunked.
A former Homeland security adviser told ABC News that Rudy Giuliani and others persisted with the theory.
Democrats launched an impeachment inquiry into Trump for talking tonUkraine about Joe Biden.