Political thrillers

A political thriller is usually about the politics and trying to win votes to run the country between good and evil. Usually a political thriller gives us mystery, an interesting plot, sometimes political thrillers have assassinations.
The Manchurian candidate is a prime example of a political thriller. 
In the midst of the Gulf War, soldiers are kidnapped and brainwashed for sinister purposes.
It opens with a group of soldiers cheering in a bar in Korea as their commander, Sgt. Raymond Shaw appears to inform them that they are to be back on duty. Whilst on patrol, Shaw and his company are assaulted by Korean troops. 
After being kidnapped by the Korean troops, and then released, commander, Sgt. Shaw is welcomed back to USA as a hero, he accepts a medal of honour for his services, with all of his troops that he served with being supportive all but one, Ben Marco (Denzel Washington) suspecting that something sinister happened whilst they were in Korea, a brainwashing of some sort.