A group of nine senators on the Environment and Public Works Committee said on Tuesday the Trump administration is illegally withholding $3 billion in previously awarded funds to states for electric vehicle charging.

Experts are questioning President Donald Trump’s latest effort to slow the electric vehicle charging buildout in the U.S. In a letter Thursday night, the Trump administration directed states to stop spending money for EV charging infrastructure,

“The majority of Americans will read this and pick up that ‘Trump has killed EV charging,’” said Loren McDonald, a principal at the EV-charging data firm Paren. “For people that are on the fence on getting an EV, this means ‘I shouldn’t get one because I won’t be able to take that road trip.’”