No one alive has seen a race like the 2024 presidential election. For months, if not years, many people have expected a reprise of the 2020 election, a matchup between the sitting president and a former president. But that hasn’t prevented a crowded primary. On the GOP side, more than a dozen candidates are ostensibly vying for the nomination. Donald Trump’s lead appears prohibitive, but then again, no candidate has ever won his party’s nomination while facing four (so far) separate felony indictments. (Then again, no one has ever lost his party’s nomination while facing four separate felony indictments either.) Ron DeSantis has not budged from his position as the leading challenger to Trump, but his support has weakened, encouraging a large field of Republicans who are hoping for a lucky break, a Trump collapse, a VP nomination, or maybe just some fun travel and a cable-news contract down the road. David A. Graham: The first debate is Ramaswamy and the rest On the other side, Democratic hesitations about a second Biden term have either …