Some Democrats are calling on President Donald Trump to testify under oath after his personal attorney suggested that fired FBI Director James Comey lied under oath and Trump tweeted Friday that Comey's hearing was a "total and complete vindication" in spite of "so many false statements and lies." Comey's statements — lying under oath would constitute a federal crime — carry more legal weight than those of Trump and his team, since they are not under oath. That provided the inspiration for a few Democratic senators to suggest that Trump testify under oath.