Trump is expected to sign a measure blocking California's nation-leading vehicle emissions rules

President Donald Trump is expected to sign a measure Thursday that blocks California’s first-in-the-nation rule banning the sale of new gas-powered cars by 2035. Trump also plans to sign measures blocking California rules to curb tailpipe emissions in certain vehicles and smog-forming nitrogen oxide pollution from trucks. That’s according to a White House official who spoke on condition of anonymity to share plans not yet public. The move comes amid a clash between Trump and Democratic California Gov. Gavin Newsom over the president's deployment of troops to Los Angeles in response to immigration protests.