Donald Trump has faced a tough crowd as he met Republicans in Congress but several lawmakers, including past critics, have emerged from the closed-door meeting with encouraging words about their presumptive White House nominee.
Republican aides cited good attendance from both houses of Congress at the two meetings on Thursday, although some lawmakers made a point of staying away, citing previous commitments.
Trump drew 41 of 54 Republican senators to the US Senate meeting.
At the first meeting, with members of the House of Representatives, Trump shared a hug with House Speaker Paul Ryan, a Republican who has often criticised Trump even while endorsing him, lawmakers said.
They joked a bit about some of their past exchanges during an hour-long meeting, and Trump took questions.
Representative Bill Flores said Trump told lawmakers there had been a few times when "I said this, and Paul had to react this way. And I understand it, I get it."
Flores quoted Trump as saying: "I'm going to make you proud."
Trump won grassroots support during months of state-by-state nominating contests with a pledge to ban Muslims temporarily from entering the United States and to build a wall on the US border with Mexico.
He has managed to annoy party leaders with inflammatory remarks to this day.
One of the questions for Trump came from Representative Cresent Hardy, a freshman from Nevada who asked whether Trump could help win the votes of minorities, including Hispanics, in his state.
Hardy said he was satisfied with Trump's response. "He thinks he has the ability," Hardy said. He said Trump said "polls are showing he's doing well in the state of Nevada."
There were some reports of tension in Trump's meeting with Republican senators. Trump admonished three of them who had been critical of his candidacy and predicted they would lose their Senate races on Election Day, The Washington Post said, citing Republican officials.
"I need to be persuaded," said Representative Charlie Dent, a moderate Republican from Pennsylvania. He said he would not support either Trump or the presumptive Democratic nominee, Hillary Clinton.
Like some other leading Republicans, Dent said he would skip the Republican nominating convention in Cleveland starting on July 18.
Dent did not appear to be impressed with Trump's response to questions about how he would appeal to Hispanics. "He said Hispanics love him," Dent said.
