America is a weird country, and that was very clearly on display on Monday in Philadelphia. Speaking to a crowd of hundreds two blocks from Independence Hall, Robert F. Kennedy Jr. announced his independent bid for the presidency in front of what often felt like a convention of the political fringe. For Kennedy, the event functioned as a restart to a 2024 campaign that he originally launched as a Democrat in the spring, but that had failed to gain momentum among the party’s primary electorate. Adherents to every niche point view showed up for the start of the political scion’s...