Republicans can't stop talking about former President Joe Biden. The GOP-controlled House of Representatives has launched investigations that assert Biden’s closest advisers covered up a physical and mental decline. The Republican-controlled Senate has started a series of hearings focused on his mental fitness. And President Donald Trump’s White House has opened its own investigation into the Biden administration’s use of the presidential autopen. It all fits with Trump’s practice of blaming his predecessors for the nation's ills. But the strategy also carries risks. The more Republicans and Democrats talk about the 82-year-old former president, the less they are able to make arguments to voters about Trump's presidency ahead of the 2026 midterms.