An incumbent president seeking re-election usually faces no significant opposition during their respective party's primaries, especially if they are still popular.For Presidents Ronald Reagan, Bill Clinton, George W.A poor showing for the GOP in the 2018 midterm elections may lead to an influx of ambitious politicians vying to reclaim the nomination from Trump, as Arizona Senator John Mc Cain has said that "[republicans] see weakness in this president." Maine Senator Susan Collins, Kentucky Senator Rand Paul, and New Jersey Governor Chris Christie have all expressed doubts that Trump will be the 2020 nominee, with Collins stating "it's too difficult to say." His reelection campaign is ongoing.
Senator Ted Kennedy then carried 12 states while running against Carter during the 1980 Democratic Party primaries; Reagan then defeated Carter in the fall of 1980.
Candidates for the presidency typically seek the nomination of one of the various political parties of the United States, in which case each party develops a method (such as a primary election) to choose the candidate the party deems best suited to run for the position.
The primary elections are usually indirect elections where voters cast ballots for a slate of party delegates pledged to a particular candidate.
Pat Buchanan captured a decent percentage of a protest vote against George H. Bush during the 1992 Republican primaries, but only received a handful of delegates; Bush too subsequently went on to lose in the general election to Clinton.
Beginning in August 2017, reports arose that members of the Republican Party were preparing a "shadow campaign" against Trump, particularly from the moderate or establishment wings of the party.