In the Line of Fire (1993)

Secret Service agent Frank Horrigan, played by Clint Eastwood, is haunted by the failure to protect President Kennedy in 1963. Years later, a former CIA assassin, played by John Malkovich, threatens to assassinate the current President, leading to a high-stakes cat-and-mouse game between them. As Horrigan races against time to stop the assassination and redeem himself, he must confront his own demons and outwit the cunning assassin.