Republican candidates Ted Cruz and John Kasich dropped out of the presidential race after losses in the Indiana primary on Tuesday.
Cruz's decision came on the same day as the results of the primaries were declared, while Kasich ended his campaign late Wednesday.
Donald Trump won the Indiana primary with 53.3 percent votes, while Cruz trailed at 36.7 percent, followed by Kasich at 7.5 percent.
Cruz finished the race to the Republican nomination with 565 delegates, and Kasich with 153. Trump had maintained his lead in the primaries, and now has the backing of 1,053 delegates.
"American parents and grandparents will watch the fireworks with their kids and will dream of the grandchildren and great-grandchildren to come and wonder how those future generations of Americans will remember what we do not only this summer but in the coming decades," Cruz said in his Tuesday speech after dropping out of the campaign.
"From the beginning I've said that I would continue on as long as there was a viable path to victory. Tonight, I'm sorry to say it appears that path has been foreclosed. Together, we left it all on the field in Indiana."
"I am not suspending our fight to defend the constitution, to defend the Judeo-Christian values that built America," he said.
Kasich was the last Republican candidate to withdraw from the race.
The Ohio governor had earlier faced pressure to step down from the race, with only a small number of delegates supporting him outside his home state.
After the results of Indiana primary, Kasich still wanted to remain in the race until the Republican National Convention. He even posted a Star Wars parody video on Twitter early Wednesday, saying that he was the "only hope" left to defeat Donald Trump and Democratic forerunner Hillary Clinton.
But, he changed his mind when he was at the Columbus airport. According to CNN, he was quoted by a source as saying, "My heart is not in this." He had scheduled a press conference yesterday, but decided to end the campaign with an official statement at 5 pm ET.
"I have always said that the Lord has a purpose for me as he has for everyone," Kasich said. "And as I suspend my campaign today, I have renewed faith, deeper faith, that the Lord will show me the way forward, and fulfill the purpose of my life."
