Bobulinski told host Tukcer Carlson moments earlier that he met Joe Biden twice to discuss the family's business dealings in China, calling the Democratic candidate a 'blatant liar' for denying any connection to Hunter Biden's international network.
Trump used the interview as the key kick-off message to his rally in Nebraska, which followed an earlier rally in Wisconsin where the president focused his attacks on Alexandria Ocasio-Cortez and Bernie Sanders.
At the first of three rallies in Michigan, Trump made his pitch by criticizing the state's governor Gretchen Whitmer and Ilhan Omar as first lady, Melania Trump, made a rare campaign appearance to call the president "kind hearted".
If it was even the first lady at all. Ms Trump faced renewed conspiracy theories that she uses a body double after a new picture set off a fresh round of speculation on social media.
Whether a fake or real first lady, we can be sure she "believes in science", saying at her speech that the Covid-19 vaccine will save millions of lives.
While scientists may be believed on a Covid-19 vaccine, the president says the media can't be believed on the pandemic. Trump raged on Twitter about the media’s coverage of coronavirus, which has killed 226,000 Americans.