Republican Sen. Mitch McConnell said Wednesday that easy access to guns is not the “core of the problem” after America suffered another mass shooting on the Fourth of July. Repeating conservative talking points, the Senate Minority Leader suggested that addressing mental illness would be the best way to stop gun violence like the bloodshed at the Independence Day parade in Highland Park, a suburb 25 miles north of Chicago. “The core of the problem is not the Second Amendment,” McConnell said in an appearance in his home state of Kentucky. “We have got to figure out some way to identify these t…