It's an argument without much basis in law or Supreme Court precedent, experts tell CNBC, but it could be politically effective.
The push underscores the massive resistance the White House faces for the policy of splitting up families crossing U.S. borders illegally.
Jeff Merkley, Cory Booker and Bernie Sanders have also either said the president should consider resigning or outright urged him to step down.
Sen. Al Franken plans an announcement Thursday after new allegations and growing calls for his resignation.
U.S. Senate Republicans rammed forward a tax-cut bill in an abrupt, partisan committee vote that set up a full vote by the Senate as soon as Thursday.
Democratic lawmakers demanded the appointment of a special prosecutor after FBI Director James Comey was fired on Tuesday.
A Senate showdown is at hand over President Donald Trump's Supreme Court nominee, and it could change the Senate and the court for years to come.
GOP leaders said Gorsuch had the votes to wipe away Democratic roadblocks but vowed to preserve the minority party's ability to hold up legislation.
Senator Jeff Merkley vows to filibuster Trump's Supreme Court nominee. Vox reports.
Steve Mnuchin, who was finance chairman for Trump's presidential campaign, is a Wall Street veteran, having spent 17 years at Goldman Sachs.
Sources told Dow Jones that the SEC has requested documents from the bank in recent weeks.