MILWAUKEE — In his first presidential campaign, Donald Trump famously declared at the Republican National Convention, “I alone can fix it,” asking his fellow members to put their trust not in God or the political elite but in him.

Yet eight years later, after surviving an assassination attempt, trouncing a wide field of GOP primary rivals, and battling against multiple legal cases, Trump now has the backing of the majority of the GOP. Republicans who were wary of Trump in 2016, when he was a political novice, have fervently rallied around him in the close election against President Joe Biden.