One hundred seventy members of the U.S. House of Representatives signed a bipartisan letter sent to Secretary of State Antony Blinken urging President Joe Biden’s administration to address “troubling” human rights issues as it formulates policy for dealings with Turkey.

The letter, dated Feb. 26 and made public on Monday, notes that NATO ally Turkey has long been an important U.S. partner but says the administration of President Tayyip Erdogan has strained the relationship.