https://en.wikipedia.org/wiki/List_of_United_States_Republican_Party_presidential_tickets

This is a list of the candidates for the offices of President of the United States and Vice President of the United States of the Republican Party of the United States.

https://en.wikipedia.org/wiki/2016_Republican_Party_presidential_candidates

This article contains the list of candidates associated with the 2016 Republican Party presidential primaries for the 2016 United States presidential election.

https://en.wikipedia.org/wiki/Republican_Party_presidential_primaries

Presidential primaries have been held in the United States since 1912 to nominate the ... Party presidential primaries, 1924. Republican incumbent President Calvin Coolidge ran for re-election, and faced no major opposition in the primaries.

https://ballotpedia.org/Presidential_candidates,_2020

The following 26 elected officials and notable public figures—24 Democrats and two Republicans—have filed to run for president with the Federal Election ...

https://www.nytimes.com/interactive/2016/us/elections/2016-presidential-candidates.html

The Republican field began with 17 candidates, 16 of whom have dropped out. ... I am endorsing Hillary Clinton and why she must become our next president.”.

https://www.nytimes.com/interactive/2019/us/politics/2020-presidential-candidates.html

3 days ago ... Regards 2020 as his last chance to run for president. ... Known as a pragmatist who was able to win Republican support for liberal priorities.

http://fortune.com/2019/04/22/republican-presidential-candidates-2020/

Apr 22, 2019 ... The Republicans considering facing Trump in the 2020 primary are aware of ... Ted Kennedy ran a primary campaign against President Jimmy ...

https://www.newyorker.com/magazine/2018/12/24/republicans-who-could-run-against-trump

Dec 16, 2018 ... Amy Davidson Sorkin on the Republican primary challengers Trump may ... the last candidate to drop out of the 2016 Presidential primaries.

https://www.vox.com/policy-and-politics/2019/3/1/18246059/2020-election-democratic-candidates-list-who-is-running-for-president

May 29, 2019 ... The number of 2020 Democratic candidates who are running for ... On the Republican side, there is of course President Donald Trump.

https://www.theatlantic.com/politics/archive/2019/06/2020-candidates-president-guide/582598/

Jun 3, 2019 ... Maryland Governor Larry Hogan was the last, best hope of anti-Trump Republicans, but now he says he won't run.