"When the Democrats passed the Affordable Care Act back in 2009, I wasn't in the Senate, but there were hearings after hearings after hearings over a year before they came to the conclusion that they were going to have to pass the bill without Republicans", he said on CNN's "New Day".
Senate Democrats on Tuesday continued to assail how Republican leaders are crafting legislation to overhaul the USA health care system, calling it "legislative malpractice", and are using GOP leaders' own statements from years past to make their point.
GOP Senate leaders have suggested they plan to vote on the bill before the week-long July 4 recess.
Senate Majority Leader Mitch McConnell, Kentucky Republican, defended the push to skip hearings and move the bill - eventually - straight to a vote.
Their descriptions of Trump's words differed slightly.
He said a replacement will be "generous, kind" and show "heart" and promised more funding.
White House aides declined to talk on the record about Trump's words.
"It's going to be an unbelievable victory when we get it through the Senate", he added.
The opioid crises sweeping through American communities is becoming a thorn in the side of congressional Republicans trying to overhaul former President Barack Obama's landmark health care legislation.
"Americans won't forget that @HouseGOP passed a "mean" bill to rip healthcare from millions then celebrated @ the WH", said Rep. Elijah Cummings, D-Md.
Attendees at the lunch include Iowa Sen.
The measure's final version reflected a compromise by conservative leader Rep. Mark Meadows, R-N.C., and centrist Rep. Tom MacArthur, R-N.J. Democrats oppose that idea because they say it would lead to much higher premiums for such sick people. Rob Portman, a Republican from OH, has proposed a seven-year "glide path" that would more gradually phase out the federal match funds. "It is all being done with an eye to try get it by with 50 votes and the vice president".
Conservatives on and off Capitol Hill fear they're losing ground in their fight to influence the Senate bill that will repeal and replace Obamacare.
House Republicans have pushed through a bill that seeks to ensure people in the country illegally can not get tax credits to pay their health insurance premiums. Just last weekend, Trump used his golf club in Bedminster, N.J., to hold a fundraising event for MacArthur that netted $800,000.
"I heard you, Mr. Secretary, just say, 'We'd love your support, ' " McCaskill said.
Republican Sen. Rob Portman of OH has expressed concern that rolling back Obamacare's Medicaid expansion program without offering consumers another affordable option would place an undue burden on those seeking substance-abuse treatments.