Ohio Rep. Steve Stivers, the chairman of the National Republican Congressional Committee, believes President Donald Trump can be useful in any district to help Republicans hold the House majority.

“I am convinced we know how to use the president in any district in America,” Stivers said a Christian Science Monitor breakfast Friday morning.

The NRCC chairman clarified that it doesn’t necessarily mean sending the president into every district in person, but that Trump is an important part of turning out the GOP base and his message can be deployed via robocalls.

The Democratic base has been energized by Trump’s presidency, with many candidates outraising GOP hopefuls and incumbents. Democrats need a net gain of 23 seats to win the majority, and the party has identified a number of suburban districts where the president is unpopular as part of their path to the majority.

Stivers said he feels “pretty good” about GOP chances of retaining House control, pointing to four races — all in Minnesota — as bellwethers for the midterms. Republicans are trying to hold the 2nd and 3rd districts and are contesting open races in the 1st and 8th districts.