Sen. Joni Ernst (R-Iowa) said on Tuesday that President Trump’s frequent trips to his Mar-a-Lago residence in Florida bother not only her, but other members of the Republican caucus.

“I do wish he would spend more time in Washington, D.C.,” Ernst said during a town hall meeting. “That’s what we have the White House for.”

Since he took office, Trump has spent seven out of the last 13 weekends at his self-described “winter White House” in Palm Beach. The visits have stirred controversy, in part because of the enormous costs associated with such frequent travel.

One estimate of the weekend trips by CNN placed the cost so far above $20 million, putting Trump on track to spend more on travel in his first year in office than former President Obama spent in eight years.