Arkansas Sen. Tom Cotton warned Monday that any senator who votes for the looming Iran nuclear agreement would be held accountable later if the deal ends up giving Iran the means to build a nuclear bomb.

Cotton, an Arkansas Republican, has been of the more outspoken opponents to a nuclear deal with Iran that President Obama says will scale back Tehran's nuclear activities in exchange for sanctions relief.

"Any congressman or senator who votes for this deal is voting to put their political fate in the hands of the Ayatollah for the rest of his or her life in the public spotlight, because if Iran gets a nuclear weapon in a year, or five years, or 10 years, the American people will want to know who supported the deal that gave them that nuclear weapon," Cotton said on Hugh Hewitt's show Monday night.

He added: "And they will hold that person accountable. So that's what every Democrat congressman and senator is going to be thinking about when they present this very dangerous deal to the Congress that they reach in Vienna."

Negotiators from Iran, the U.S., Britain, Germany, France, Spain and China missed their fifth deadline for a comprehensive long-term nuclear deal since June 30 on Monday, but were expected to announce some kind of agreement on Tuesday.

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