Florida Sen. Marco Rubio, speaking to a crowd of supporters in Las Vegas, described the international deal struck in Paris over the weekend as an “unfunny joke.”

“The president just signed this unfunny joke of a climate deal,” Rubio said. “It’s a ridiculous deal.”

Rubio went on to express doubt that China will fulfill its end of the bargain. “This kind of unilateral disarmament in our economy is reckless, and it is hurting the American Dream,” Rubio added.

195 countries signed the agreement, which strives to limit the rise of average global temperatures to less than two degrees Celsius.