Associated Press/J. Scott Applewhite Mark Warner, the ranking member on the Senate Intelligence Committee, warned President Donald Trump to "be careful what you wish for" after Trump ordered the release of sensitive materials related to the Russia investigation. Trump has ordered "the immediate declassification" of parts of the FBI's June 2017 application to surveil former Trump campaign aide Carter Page. While the Trump campaign sought to distance itself from Page after he drew scrutiny, the former adviser testified to the House Intelligence Committee last year that he had several contacts with people linked to Russia, at times with the campaign's knowledge. Mark Warner, the ranking member on the Senate Intelligence Committee, issued a stark warning after President Donald Trump on Monday ordered the release of sensitive materials related to the Russia investigation. "Be careful what you wish for," Warner said.See the rest of the story at Business InsiderNOW WATCH: Inside the Trump MAGA hat factorySee Also:Experts say federal investigators now have 'the perfect storm of cooperators' against Trump'Off the charts': National-security experts sound the alarm after Trump moves to selectively declassify the Carter Page FISA applicationAs Trump orders the release of classified Russia docs, a top House Democrat says the FBI and DOJ told him the move would be a 'red line'SEE ALSO: As Trump orders the release of classified Russia docs, a top House Democrat says the FBI and DOJ told him the move would be a 'red line'