While previous presidents had held rallies in the early days of their presidency to garner support for legislation, such rallies differed from those held by Trump in that they were funded by the White House rather than by campaign committees. One of the advantages of having his campaign committee fund the events is that organizers can more discriminately screen attendees, refusing entry to non-supporters. Trump's February rally in Melbourne, Florida was the earliest campaign rally for an incumbent president.
Presidential approval ratings have shown Trump to be the least popular president in the history of modern opinion polling as of the start of his second year in office. Early polls have shown Trump trailing by a margin of 10–18 percent against several hypothetical Democratic candidates, including Bernie Sanders, Joe Biden, Cory Booker, Elizabeth Warren, and Kirsten Gillibrand. In 2018, the presidential reelection effort and the Congressional midterms both drew presidential campaign attention.