Several of the former president's past challengers, including Nikki Haley, voiced full support for his candidacy.

Ms Haley previously said she would not attend, but announced her speech after an attempt on Trump's life.

Ms Haley was once Mr Trump's UN ambassador and was the last of his major Republican primary rivals.

Donald Trump and Joe Biden had sweeping wins, but there were also warning signs for both candidates.

The former South Carolina governor exited the race Wednesday, leaving Trump as the last Republican candidate.

The former South Carolina governor ended her run for the White House after a year-long campaign.

Democrats and Republicans were choosing who they want to stand for president - here are the full results.

The big primary day further consolidated Trump's lead over Haley, and was an unsurprising sweep for Biden.