Marvel Two-In-One#27(1977)

Having pulled Deathlok from the future, Mentallo and Fixer easily take control of the android and Mentallo uses his illusions to distract Nick Fury and the Thing long enough for them to make their escape. They explain to Deathlok that they learned of his existence when Mentallo happened to read Spider-Man's mind following his return to New York after an adventure through time. They also tell Deathlok that their intention is to use him to assassinate the President of the United States, who is to be inaugurated into office in the near future. The Fantastic Four and Nick Fury, believing that this may be Mentallo and Fixer's intention, are guests at the inauguration ceremony. True enough, Mentallo, Fixer, and Deathlok arrive on the scene, Deathlok is given a rifle to assassinate President Carter, however, he tries to fight his programming the whole way. When Deathlok finally snaps, he apparently shoots the President. The Fantastic Four and Nick Fury manage to defeat Mentallo, Fixer, and Deathlok shortly after and the dead "President" turns out to be the Impossible Man in disguise, who is alive and well. After the battle, Reed Richards takes Deathlok into his custody and the inauguration ceremony continues as planned.