President Trump called Tuesday on all current and former White House aides to avoid testifying to congressional panels, suggesting he’ll invoke executive privilege to block a subpoena ordering former White House counsel Donald McGahn to testify to Congress. Speaking with The Washington Post, Trump said complying with congressional requests was unnecessary after the White House cooperated with special counsel Robert Mueller’s probe into Russian interference in the 2016 election. This comes as Democratic lawmakers are scheduling a vote on charges of contempt of Congress against White House personnel security director Carl Kline, who has refused to testify to the House Oversight Committee.