DES MOINES — Vice President Mike Pence on Saturday reassured Iowa conservatives, some of them cool to Donald Trump, that the president will deliver on his campaign promises to boost the economy.

Speaking at the annual fundraiser of Iowa Sen. Joni Ernst, Pence told more than 1,400 Iowa Republicans that, thanks to Trump, “American businesses are growing again, they are investing in America again.”

Pence promoted low unemployment and the economy’s overall health, which he attributed to Trump’s cancellation of regulations enacted under President Barack Obama. And, in particular, he described pulling out of the international climate agreement reached in Paris as a show of support for U.S. workers.

“President Donald Trump chose to put the forgotten men and women of America first,” Pence said at the sun-drenched Central Iowa Expo in rural Boone, Iowa.

But Pence also pressured Iowa’s Senate delegation not to relent on Trump’s centerpiece campaign promise to replace the 2010 federal health care law, despite caution from Ernst and senior Iowa Sen. Chuck Grassley that uprooting Obama’s overhaul was unlikely in the Senate.

“We’ve got more work to do,” Pence said. “First and foremost, this summer, this Congress must come together and heed the president’s leadership and we must repeal and replace Obamacare.”

Pence’s work to solidify Republican support in Iowa, which Trump won in November by 9 percentage points, came amid caution from the state’s influential Christian conservatives who have said Trump had more to prove to them.

“I’m still waiting to see a conservative agenda put forward,” Iowa Republican Kay Quirk, a retired nurse from the socially conservative northwest region of the state, said before Pence spoke. “I haven’t given up hope by any means. But I’m still waiting.”

Trump also “has stood for the sanctity of human life,” Pence said. Trump’s latest budget proposal would prohibit any funding for certain entities that provide abortions, including Planned Parenthood. Federal law already prohibits money for abortion.

Pence did not mention Trump’s difficulties, including investigations over whether people associated with Trump’s campaign or administration colluded with the Russians to influence the 2016 elections and over the president’s firing of the man investigating the matter, former FBI Director James Comey.