WASHINGTON (AP) ??" The Trump administration is making a concession on its proposed minimum fuel economy requirement for new vehicles, but environmental groups and a key Democratic senator complain it does not go far enough, and still falls well below the requirements set under the Obama administration. Fuel economy standards would increase 1. 5% per year from 2021 through 2026 under the new proposal. That's a reversal from the Trump administration's proposal in 2018, which sought to freeze at...