A bipartisan group of Senators introduced a bill on Thursday that intends to prohibit the president from withdrawing from NATO without Senate approval.

Senators Tim Kaine (D-VA), Marco Rubio (R-FL) and other members of the Senate Foreign Relations Committee stressed the importance of the alliance amid reports that President Trump had expressed interest in withdrawing.

“President Trump’s repeated threats to withdraw from NATO are dangerous,” Kaine said in a statement. “Our NATO allies have fought alongside our troops since World War II, yet President Trump disparages these nations and cozies up to our adversaries.”

Other members who reintroduced the bill were Cory Gardner (R-CO), Jack Reed (D-RI), Lindsey Graham, (R-SC), Chris Coons (D-DE), Richard Blumenthal (D-CT), and Susan Collins (R-ME).

“NATO is more important than ever with Russia’s growing subversive activities in the region and beyond,” Rubio said in a statement. “It is critical to our national security and the security of our allies in Europe that the United States remain engaged and play an active role in NATO.”

The New York Times reported on Monday that President Trump had considered withdrawing from the international alliance.

The NATO bill had originally been introduced in July.