The ailing U.S. coal industry is ramping up its political and legal offensive to win approval for West Coast export terminals that could provide a lifeline to lucrative Asia markets.

Coal producers filed two recent lawsuits against governments in Washington state and California challenging local decisions to block port projects on environmental grounds. The industry is also lobbying the Trump administration to override the local bans.

The fight reflects the sector's desperation to boost exports as U.S. utilities continue their shift away from coal-fired power — despite Trump policies aimed at helping miners.