President Trump has threatened to slap new tariffs on Mexico for failing to deliver water under a decades-old treaty. But climate change has decimated river flows.

U.S. President Donald Trump on Thursday threatened Mexico with sanctions and tariffs in a dispute over water sharing between the two countries, accusing Mexico of breaking an 81-year-old treaty and "stealing the water from Texas Farmers.

“Xi will not be forced into a call,” said Sun Yun, director of the China program at the Washington-based think tank Stimson Center. Only once in recent history, she noted, has a Chinese leader phoned the United States without invitation — after the 9/11 terrorist attacks. The trade tensions, if unchecked, could spill into other domains, she warned.

NBC Senior Business Correspondent Christine Romans explains how soon consumers could feel the impact of President Trump’s tariffs. CNBC Senior Economics reporter Steve Liesman says Wall Street “still doesn’t like” President Trump’s tariff policies.

President Donald Trump said his tariffs may cause “transition problems” but expressed confidence in his plan, after the White House clarified US tariffs on China rose to 145%.

President Donald Trump, when asked about a Salvadoran man deported from the United States in error, on Friday told reporters that he would follow what the Supreme Court said, a day after the top court told the government to facilitate the man's return.

The U.S. Supreme Court directed President Donald Trump's administration on Thursday to facilitate the return to the United States of a Salvadoran man who the government has acknowledged was deported in error to El Salvador.