I saw this presidential spoof movie on TCM about 6 years ago, most likely originally from the 70s. It was in color. I remember two scenes.
In one scene the protagonist is on a house boat I think it was yellow. I believe he may have been choosing clothes at some point. I remember him talking to someone as he walked throughout the boat.
In another scene I think he tries to reach out to hippies. He tries drugs and makes love in the grass with one maybe two women.
I saw this on TV so nothing explicit, but I remember the humor being very dry and adult.