Republican challenger state Rep. Geoff Diehl is confident Bay State voters will support him over U.S. Sen. Elizabeth Warren despite his proudly pro-Trump stance in the state with the lowest approval rating of the president.

“People in Massachusetts are pretty smart about knowing who they want to serve them,” Diehl told the Herald yesterday. “They’ve chosen a Republican governor in the last election cycle. They are looking at what is in their best interests down the road, and I think they know that it is the person, not necessarily the party, that matters.

“For me, having a relationship with the administration gives me a seat at the table down in Washington that Elizabeth Warren will never have based on the way she wants to obstruct everything,” he added.

Days after winning the Republican Senate primary to challenge Warren, Diehl met with potential voters at the Houghs Neck Chowda­fest in Quincy.

Facing an uphill battle in his challenge to Warren, a popular liberal seen as a possible 2020 presidential contender, Diehl reasserted he will put “Massachusetts first.”

He has a $200,000 war chest, a significant deficit against the $15.6 million Warren has built for her campaign.

He said he will only discuss pledging against using outside funds if Warren “liquidates her current holdings of outside money.” Warren and Diehl have both agreed to three debates before the November election.

“I have a track record of delivering tax cuts to the people of Massachusetts,” Diehl said. “I have a pretty good track record of working with people on Beacon Hill in a bipartisan way where she seems to be more focused on obstructing everything Congress is trying to get done.

“I also am not planning on running for the White House in 2020, which she seems to be geared towards.

“Senator Warren has made it clear that she wants to see a bigger government that increases taxes, undoes the tax reform passed in 2017 that has given Massachusetts really a country-leading unemployment (at) 5.3 percent,” he said. “Right now, we’re seeing wage growth reported yesterday at almost 3 percent. So that is translating in Massachusetts to more money in folks’ bank accounts and she wants to undo that. That’s a huge difference between her and me.”