Artifacts from 1972

I have two artifacts from the 1970s. The first one was found by my neighbor Ceci when she was playing frisbee golf last weekend. I hadn't seen one of these in quite awhile:














The next one is more difficult to explain. First, think of who ran against Nixon in 1972. George McGovern, of course. And McGovern's running mate was Sargent Shriver. So can you explain this "McGovern Eagleton" button?