LITTLE ROCK, Ark. (AP) — Gov. Mike Beebe says some lawmakers are looking at revisiting the state's severance tax on natural gas, but he says he's not optimistic much can be done in this year's session.

Beebe said on AETN Thursday night he doesn't know of any specific proposals to raise the tax, but he said some legislators are looking at the issue. Beebe said he thinks any increase would be an uphill battle because of an anti-tax sentiment in the Legislature this year.

Arkansas raised the severance tax to pay for highway improvements in a 2008 special session after Beebe reached a compromise with natural gas firms. Former natural gas executive Sheffield Nelson has said he may try to put a tax increase proposal on the 2012 ballot.