WASHINGTON — President Barack Obama and Secretary of State John Kerry hailed the newly passed international climate change agreement as a major achievement that could help turn the tide on global warming, but got a quick reminder that Republicans will fight it all the way.

Obama said the climate agreement made Saturday night by almost 200 nations “can be a turning point for the world” and credited his administration for playing a key role. He and Kerry predicted it would prompt widespread spending on clean energy and help stem carbon pollution blamed for global warming.

The immediate reaction of leading Republican critics was a stark reminder of the conflict that lies ahead.

Senate Majority Leader Mitch McConnell of Kentucky said Obama is “making promises he can’t keep” and should remember that the agreement “is subject to being shredded in 13 months.” McConnell noted that the presidential election is next year and the agreement could be reversed if the GOP wins the White House.