By Tiffany Terrell Appearing on MSNBC’s “Morning Joe” on Monday morning, longtime Republican pollster Frank Luntz warned the Republican Party leadership that they need to do something to stop former President Donald Trump from announcing his plan to run again in 2024 if they have any hope of winning both chambers on Congress in November. Speaking with fill-in host Jonathan Lemire, Luntz also said he had some bad news for the former president based on recent polling and focus groups. “We are starting to see Trump drop below the critical 50 percent mark in terms of who Republicans want to see as…