"Let's all bring some civility back to our politics," Brennan says

On Capitol Hill this past week, a U.S. senator challenged a testifying witness to a fight and the former House speaker was accused of elbowing a member of Congress. With the presidential election less than a year away, "Face the Nation" moderator Margaret Brennan says "let's all bring some civility back to our politics — the serious issues facing our country require it."