President Thomas Whitmore (Independence Day):
Republican, unfortunately 
President James Marshall (Air Force One):
Republican, unfortunately His speech at the beginning gives it away.
President Tom Beck (Deep Impact):
DemocratPresident Bensen (Hot Shots part deux): Never seen it
President James Dale (Mars Attacks):
DemocratPresident Paul Hollister (10.5): Never seen it
President Bennett (Clear and Present Danger): Never seen it
No name given to President (Escape from LA): Never seen it
President Bill Mitchell (Dave):
Democrat, a pretty obvious analogue for Bill ClintonPresident/Vice President Becker (The Day after Tommorow):
Republican, VP is clearly an analogue for Cheney
