President Donald Trump moved on Monday to immediately release a tranche of former FBI Director James Comey's text messages and declassify 20 pages of a surveillance application that targeted former campaign adviser Carter Page, Trump's latest offensive against a Russia investigation that has ensnared associates and has consumed his attention for much of his presidency.

The breadth of the order came as a surprise and landed amid a full-court White House effort to shore up the Supreme Court nomination of Judge Brett Kavanaugh, as he defends himself against a sexual assault allegation. Trump demanded that the FBI produce 20 pages of the surveillance application — which Republicans on Capitol Hill have suggested would help show anti-Trump bias at the highest levels of the FBI.