 It's becoming more of an issue and was front and center today at a White House press briefing. Press Secretary Corrine Jean-Pierre was repeatedly questioned on the topic. President's handlers, meanwhile, say he'll be making more public appearances in coming days, including a meeting with Democratic governors tomorrow and trips to Wisconsin and Pennsylvania this week. Questions have also been raised about past lapses on the part of former President Donald Trump, the presumptive Republican nominee. Biden is 81. Trump is 78 years old.