A group of Republican lawmakers called on the U.S. president to consider sending American servicemen to Ukraine in connection with the growing threat of Russian aggression.

A group of American Republican congressmen led by Mike Turner appealed to President Joe Biden with a request to consider the possibility of sending American servicemen to Ukraine, as well as to immediately provide Kyiv with support in the form of providing intelligence and arms supplies in connection with the next build-up of Russian military power near the border with Ukraine. The text of the appeal was published on Twitter by Fox News White House correspondent Jacqui Heinrich.

In their address, 15 lawmakers also called on the Biden administration to “deploy the US military presence in the Black Sea to deter the Russian invasion.”

“Russia’s behavior is becoming more aggressive, it is intensifying critical rhetoric against Ukraine on a variety of topics, from the modernization of the Ukrainian Armed Forces and military partnership to Ukraine’s accession to NATO,” the appeal says, “Although Russia’s intentions are not clear, the presence of the Russian elite 1st Guards Tank Division confirms fears that Russia is planning a new invasion of Ukraine.”

The congressmen stressed that the current administration “cannot ignore the ongoing threat from Russia to international law and the territorial sovereignty of Ukraine.”

In addition to Turner, Republican Congressmen Mike Rogers, Michael Waltz, Vicky Hartzler, Mike Johnson, Joe Wilson, Don Bacon, Austin Scott, Doug Lamborn, Scott Franklin, Ronnie Jackson, Elise Stefanik, Mike Gallagher, Scott DesJarlace, and Pat Fallon signed the appeal.

In addition, as reported on Wednesday in the Subcommittee on Relations with Europe, Energy, Environment and Cyber Environment, today American, European and Ukrainian parliamentarians issued a joint statement on the threat to security on the border with Ukraine from Russia.

“Members of the U.S. House of Representatives Committee on Foreign Affairs, the European Parliament Committee on Foreign Affairs and the Verkhovna Rada Committee on Foreign Policy and Inter-Parliamentary Cooperation strongly condemn the destabilizing military buildup of the Putin regime on the border with Ukraine,” the appeal says, “We call for a rapid, unified and decisive transatlantic response, including… sanctions and additional security assistance (to Ukraine) to deter Russia from escalating aggression against Ukraine.”

The appeal was signed by William Keating and Brian Fitzpatrick, co-Chairs of the Subcommittee on Relations with Europe, Energy, Environment and Cyber Environment in the Foreign Affairs Committee of the House of Representatives, Alexander Merezhko, Chairman of the Verkhovna Rada of Ukraine Committee on Foreign Policy and Inter-Parliamentary Cooperation and David McAllister, Chairman of the European Parliament Committee on Foreign Affairs.