Yasheng Huang

After the mass shooting at a concert in Las Vegas, Nevada, on October 1, Republican Senate Majority Leader Mitch McConnell told reporters that, “It's particularly inappropriate to politicise an event like this. It just happened within the last day and a half.”

While the presidential oath is required by the US Constitution, a candidates' oath wouldn't have to be. Political and market pressure would be enough, if print, television, and social media simply refused to carry campaign advertisements from candidates who refused to take the oath.