Sentinel (The) (2006)

This Secret Service thriller is a cogent blend of Murder at 1600 Pennyslvania (for its bad guys' quasipolitical death wish), Enemy of the State (for technology and professional logistics), and the TV series 24 (for spirit and complexity). It kept me roundly interested (though a few small plot gaps briefly set me adrift), so much that I would venture to say this is the best movie of this type I have yet seen. Four stars.