Colorado politicians are weighing in on the Trump administration’s controversial immigration and border enforcement policies.

Though Gov. John Hickenlooper downplays his national political ambitions, he once again has stepped into the national political spotlight by calling July 3 for an investigation into family separations at the U.S.-Mexico border.

Hickenlooper sent a letter to the U.S. House and Senate Judiciary committees urging them to look into the policy.

“We remain extremely concerned about the welfare of children who have been separated from their parents upon crossing the U.S. border,” the letter states. “We ask you and your congressional colleagues to take immediate steps to investigate the administration’s policies of separation and co-incarceration of these children and their parents. Additionally, we believe it critical to develop clear guidelines that prevent any abuse or trauma for children detained by immigration officials.”

The aim of the letter, besides public awareness (also known as politics), is moot, as long as the committees are led by Republicans — Sen. Chuck Grassley and Rep. Bob Goodlatte, both conditional supporters of the Trump immigration measures.

Meanwhile, in response to a letter to Congress from an official at the Department of Health and Human Services suggesting that politicians visiting the U.S.-Mexico border are slowing down family reunifications, U.S. Rep. Mike Coffman called that accusation absurd.

“I think that HHS is already trying to insulate itself by blaming members of Congress for its failures,” the Aurora Republican said July 5. “Raising concerns about the cost of HHS staff time, involved in responding to congressional visits to the border, is ridiculous. Oversight of the executive branch is the constitutional responsibility of members of Congress.”

Coffman is among the Colorado politicos who have visited the border amid the controversy over the separation of children from parents seized by authorities. Others have included Colorado House Speaker Crisanta Duran and U.S. Rep. Diana DeGette, both Democrats from Denver.

“If I had more confidence in the ability for this administration to unite these families then there would be no need for me to have visited a detention center at the border,” Coffman added. “The problem is that based on what I’ve seen, I absolutely don’t have that confidence, so I will continue to personally be involved in making sure that these families are reunited.”

Matthew Bassett, the HHS assistant secretary for legislation, sent a letter to chairs of the House and Senate judiciary committees, saying the visits by politicians had “created resource constraints that are threatening to impact (the Office of Refugee Resettlement’s) ability to quickly reunite the children in our care with a parent or safely place them with a sponsor.”

Melania Trump, the first lady, has made two visits to the border.