A bipartisan group of lawmakers sent a letter Thursday warning the Trump administration against reducing the hundreds of U.S. troops serving as peacekeeping forces in Kosovo, citing rising regional tensions. The letter represents an unusual moment of Democratic-Republican unity on foreign policy as the new administration reviews military commitments abroad.

The warning comes as Trump has historically questioned overseas military deployments and their costs, raising concerns among lawmakers about potential drawdowns in strategic regions. U.S. forces in Kosovo serve under NATO's Kosovo Force (KFOR) mission, maintaining stability in the Western Balkans since 1999.

The bipartisan nature of the letter signals broad congressional opposition to any Kosovo withdrawal, with members from both parties viewing the deployment as critical for regional security. This early pushback suggests Congress will actively resist any Trump administration moves to reduce peacekeeping commitments in Europe.

The Kosovo mission enjoys wide support among defense hawks and internationalists in both parties, who view it as a relatively low-cost way to maintain American influence in Europe. Any troop reduction could strain NATO relationships and embolden regional adversaries.

The letter follows a pattern of congressional resistance to executive branch foreign policy changes, similar to pushback Trump faced during his first term over Syria and Afghanistan withdrawals. Lawmakers appear prepared to use legislative tools to constrain presidential military decisions they view as strategically damaging.