JEFFERSON CITY, Mo. — A group of Missouri Republican lawmakers are pushing now-debunked social media posts purporting to identify one of the gunmen in the Kansas City Chiefs rally shooting and unsubstantiated assertions that one or more of the shooters were migrants in the country illegally. The hard-right Missouri Freedom Caucus’ social media page, as well as at least two of the group’s members, Republican Sens. Rick Brattin and Denny Hoskins, have shared a series of posts that claim to identify a 44-year-old man as a shooter. The Associated Press on Thursday debunked the claim as false. The …