More than 150 countries will commit to the pact, which calls for a rapid end to the rise of greenhouse gas emissions.
"I'm not going to reach 1,237," Cruz said on Wednesday, "and Donald Trump is not going to reach 1,237."
A new climate solutions caucus offers hope for an end to gridlock on Capitol Hill.
Trump's resounding New York primary victory puts him on the fast track to the Republican nomination.
It is now more difficult for Ted Cruz and Bernie Sanders to win their respective nominations.
New York City's comptroller ordered an audit after it confirmed that names had been removed from voter rolls.
Mississippi's "religious freedom" law, a look at Jerry Brown's career, how Ted Cruz could become president and more in this week's top political stories.
Hillary is headed back to New York, Bernie went to the Vatican and Trump is having brunch on Staten Island.
With gap narrowing, Donald Trump needs to win nearly 60 percent of remaining delegates to secure GOP nomination.
A group of former contestants on Donald Trump's reality television show put their old boss in the hot seat on Friday.
Cruz and Fallon discussed everything from the GOP hopeful's debating history to the prospect of a contested convention.
Cruz spoke out Tuesday night for the first time since reports surfaced accusing her husband of having extramarital affairs.
The Ohio governor said he is campaigning only to be president of the United States.
There is one big difference between Goldwater and Trump. Goldwater took over the GOP from the bottom up. Trump is trying to take it over from the top down.
The Texas senator's tenacity makes him the Colorado favorite.
The next big test in stopping the billionaire frontrunner will be New York, the state he calls home.
Wisconsin victory shows Cruz is increasingly viewed as the main Trump alternative.
Cruz's recent gains mark the first time since November that one of Trump's rivals has threatened his lead.