If Republicans step back and look beyond the legal and social-media spectacle of Donald J. Trump, they'll see screaming political sirens everywhere they gaze. Why it matters: The GOP's political trouble has been unfolding slowly but unmistakably, starting even before Trump's loss to Joe Biden in 2020. First, the 2018 House elections were a disaster for Republicans: Democrats had a net gain of 40 seats to take over the House — their largest gain since the post-Watergate election of 1974. Then Trump lost the presidency. Next, Republicans blew two runoff elections in Georgia and lost control of the U.S. Senate....