Democrats in the U.S. Senate today rejected a measure that would have given President Barack Obama additional authority to negotiate a wide-reaching trade bill with Pacific Rim nations. 

The legislation was blocked on a 52-45 vote. It needed 60 votes to move forward. 

It is likely that Obama's supporters will try again to pass the bill, despite a significant number of Democrats who oppose it. 

Fox News reported:

Republicans mostly had aligned with Obama on the issue and, after the failed test vote, urged Obama's fellow Democrats to drop their resistance.

"What we just saw here is pretty shocking," Senate Majority Leader Mitch McConnell, R-Ky., said, accusing congressional Democrats of standing with "special interests."

At issue is Obama's push for so-called "fast track" authority -- which would let him negotiate trade deals that Congress can reject or ratify, but not amend. In the short-term, he wants to use this to pursue a broad trade pact with Japan and other Pacific nations.

But many Democrats aligned with labor unions in warning about the impact on U.S. jobs, and openly opposed the White House. Senate Minority Leader Harry Reid, D-Nev., recently told reporters he's a "hell no" on the proposal. And Obama and Sen. Elizabeth Warren, D-Mass., for days have traded jabs on the matter, with the president calling Warren's claims "absolutely wrong."

Charles Krauthammer said tonight on "Special Report" that the trade agreement is extremely important "geo-politically," because it is a "way to hold our Pacific Rim allies."

He stated that trusting Obama is "a little hard" after what he's done with Obamacare and the nuclear deal with Iran.

Krauthammer said that Obama knows in the end that "free trade is a good idea." 

"But the thing is...it's not just that he doesn't schmooze with Democrats," Krauthammer said. "He never stakes or puts out there any political capital."

"Has he made one national address on television about the importance of this, if it's his number one priority?" Krauthammer questioned. "Where has he been?"

Krauthammer warned that "our Pacific Rim allies will be cut loose and will enter into China's orbit" if the trade deal falls through.

Watch the video clip above.