Harvard law professor says he will present oral arguments during Senate trial; Whitewater investigator Ken Starr and ex-Florida AG Pam Bondi also part of the team

'Today we will make history,' says Nancy Pelosi as she presents documents, 'This president will be held accountable'

Nonbinding statement affirming Congress role in declaring war passed the House last week; Republican leader McConnell urges Democrats not to 'screw up' US deterrence in Mideast

House expected to approve removal of president from office; Senate Majority Leader McConnell meets with GOP senators Tuesday as they negotiate the terms of the trial

'Every Senator now faces a choice: to be loyal to the President or the Constitution,' speaker writes in a letter to her Democratic colleagues

US president says initial outlook after Iranian strikes on Iraqi bases housing US troops was, 'So far, so good!'

Democrats call to declassify president's notification to Congress of reasons for assassination; Tehran, for its part, has vowed 'bodies of Americans' throughout the region

The decision complicates Republican efforts to retain a Senate majority, but Iran crisis makes it an awkward time for top diplomat to leave his post and seek elective office

US president lashes 'vicious crusade' against him; Democrats vow to 'defend our Constitution from all enemies, foreign and domestic' ahead of expected party-line vote

Non-binding decision, sure to anger Turkey, comes following Congress's recognition in September and three failed Senate attempts in which the White House objected