The Sentinel (2006)

Veteran Secret Service agent Pete Garrison investigates a colleague's murder and is subsequently framed as a mole in an assassination attempt on the President due to the machinations of a blackmailer who knows the secret he is hiding. Disgraced, dismissed, and now a fugitive with two relentless federal investigators hot on his heels, Garrison must both clear his name and save the president from assassination.

Tags: assassination attempt, blackmail, death threats