Amid heightened calls for stricter U.S. gun laws after a massacre at a Texas elementary school, a video published Tuesday targets Republican political candidates—and right-wing Democratic Sen. Joe Manchin of West Virginia—for using firearms in campaign advertising to appeal to voters. "If you're only going to watch one thing today, make it this," Indivisible tweeted, sharing the two-minute video produced by communications consultant Timothy Burke. If you're only going to watch one thing today, make it this.