Ukraine would receive lethal military aid from the United States if 27 senators who have appealed to President-elect Trump get their way.

“Russia has launched a military land-grab in Ukraine that is unprecedented in modern European history,” the lawmakers, led by Republican Sen. Rob Portman of Ohio and Senate Minority Whip Dick Durbin, D-Ill., wrote in a letter to Trump. “We believe it is in our vital national security interest to uphold these norms and values, and prevent America’s commitment to its allies and ideals from being called into question.”