McConnell has supported several gun control measures put forth by Democrats, including the 1991 Crime Bill S.1241 (see U.S. Senate Roll Call Vote here) sponsored by then senator Joseph Biden, that instituted a national waiting period for handgun purchases as well as a federal ban on semi-automatic firearms.[15] In 1998, McConnell voted for Barbara Boxer's Trigger Lock Amendment 3230 (see U.S. Senate Roll Call Vote here), which required the purchase of a trigger lock with the sale of each handgun.

McConnell and Benton are just being opportunists with this letter. Also note Jesse's mention of Rand Paul in the letter.