Biden claims NATO is a 'sacred commitment,' but do other countries feel the same?

While the U.S. contributes over two-thirds of NATO nations' defense sending, others not meeting the 2% goal could be looking to "hold America's coat" amid conflict.

"If you don't get to 2% GDP, you will not have the military structure, the military forces to be able to support the rest of the alliance as they enforce Article 5," retired Lt. Gen. Keith Kellogg previously told Fox News. Teny Sahakian is an Associate Producer/Writer for Fox News. Follow Teny on Twitter at @tenysahakian.