One of the legislation's co-sponsors Tim Kaine (D-VA) described that it "reaffirms US support for this crucial alliance that is foundational for our national security. It also sends a strong message to authoritarians around the world that the free world remains united."

Of course, none of these Democrats and Congressional hawks are worried for a moment that President Biden would ever entertain the idea of leaving NATO, but this is certainly a scenario Republican presidential nominee frontrunner Donald Trump has floated at various times over the years. The bipartisan legislation was also led by Senator Marco Rubio of Florida.

Trump has in recent weeks said it's something he would consider if reelected to office. He's long called the Western military alliance which stood down the Soviet Union throughout the Cold War a "paper tiger" at this point.

He spent his first term aggressively denouncing NATO members which had failed to meet the alliance's commitment to spending at least 2% of GDP on their defense budget.

As early as the year 2000, Trump has been on record as favoring the idea, for example writing in is book The America We Deserve that "pulling back from Europe would save this country millions of dollars annually."

On the other side of this is Biden who has called the NATO pact "sacred". But Trump has long criticized the kind of Washington foreign military adventurism that being at the helm of the alliance invites. From endless wars in Afghanistan and Iraq, to NATO spearheading regime change operations from Libya to Syria, Trump and his supporters have lambasted such quagmires. But in reality it's more often Washington that conducts military adventurism under the guise of 'international support' via NATO (for example, Obama's Libya intervention used NATO as a fig leaf).