Texas Attorney General Greg Abbott has threatened to file a lawsuit over the newly passed United Nations treaty aimed at regulating the international arms trade.

Here's some more background on yesterday's historic vote from FoxNews.com:

The U.N. General Assembly has

overwhelmingly approved the first U.N. treaty regulating the multibillion-dollar international arms trade. The resolution adopting the landmark treaty was approved by a vote of 154 to 3 with 23 abstentions.

The 193-member world body voted after Iran, North Korea and Syria blocked its adoption by consensus at a negotiating conference last Thursday. The three countries voted "no" on the resolution.

The National Rifle Association has portrayed the draft treaty as a threat to gun ownership rights enshrined in the U.S. Constitution and has lobbied to defeat the proposal at the U.N. The NRA last week praised the Senate's passage of an amendment to the Democratic budget proposal that would prevent the U.S. from entering into the treaty.

The Obama administration, however, formally supported the U.N. treaty-- despite the warnings from Senate lawmakers that they would not ratify it.

Megyn asked why - if the Constitution trumps any international treaty - Abbott thinks Americans should be concerned about the United Nations arms agreement. Abbott says his concern is that the U.S. government will use the U.N. as a "backdoor mechanism" to impose gun control measures that they can't pass in Congress.

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Abbott said he is trying to make sure Americans are aware of the issue ahead of a Senate vote on whether to ratify the treaty. Megyn pointed out that the treaty's supporters argue this is a proposal aimed at preventing guns from reaching "bad people" overseas, and has nothing to do with private gun ownership in the U.S.

"This is a step in a very dangerous direction. The argument can be made that the treaty is worded so vaguely that there is no specific violation of the Second Amendment right now, but there could be a violation later on depending on the way that the United Nations applies and interprets this treaty," said Abbott.

Watch the full discussion:

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