A top House Republican is calling on the Department of Homeland Security not to retaliate against a border patrol agent who has recently criticized President Obama’s immigration policies.

“I fully expect that you will personally ensure that no DHS employee or contractor will be targeted for reprisal or any other form of adverse employment action on the basis of voicing their legitimate concerns regarding compliance with unwritten departmental policies that contradict your written policies,” Judiciary Committee chairman Bob Goodlatte, R-Va., wrote in an April 18 letter to Homeland Security Secretary Jeh Johnson.