According to conservative pollster Sarah Longwell, voters are less concerned with Donald Trump’s age than they are worried about his mental fitness as they look at the presidential choices in 2024. Appearing on MSNBC’s “The Weekend,” Longwell — founder of Republican Voters Against Trump — was asked about voter worries about both Trump and President Joe Biden and she replied the public seem to hold them to two different standards. “I wonder, in your focus groups, how the two issues or bearing out, the question of the candidates and the comparison points between the two them,” co-host Alicia Men…