When candidates drop out of the race, their delegates are typically free to support another candidate of their choosing.
One already dropped out
Ted Cruz dropped out of the presidential race because he was unable to secure enough delegates to win the Republican nomination.
Drop out of the race and support the front-runner -Apex
She did badly in the Iowa caucuses and ran out of money.
A candidate can drop from the race at any time.
because his name was rick and no one likes a rick
I am not sure what you want to know. Typically there are many candidates in the early primaries and the losers gradually drop out. Sometimes a new man enters the race late. Sometimes as strong candidate hangs back and enters only after "stalking horse" does well in early primaries.
Drop out of the race and support the front-runner
forming an exploratory committee
A presidential canidate might drop out of the race if he or she doesn't win a lot of states on Super Teusday because he or she doesn't have a great or good chance at winning election
The incumbent President Ronald Reagan ran for the Republican Party, and former Vice President Walter Mondale was the nominee for the Democratic Party.