When you go back and read the history of how many potential sites were originally proposed by the DoE, and how those sites were eliminated from consideration until only Yucca Mountain was left, it turns out that both sides are anti-nuclear-waste. When the list had been reduced to three by years of deal-making in Congress, it was cut to one in a naked political maneuver involving a Texas conservative and Washington liberal in leadership positions. Following the closed-door committee meeting where the deed was done, reporters asked the chairman what had happened. The quote he gave them was, "We screwed Nevada." The change was attached to a budget reconciliation bill so that it could not be debated in either the House or the Senate.
A bill to restart the work at Yucca Mountain, or other western location, for a disposal site for eastern nuclear waste -- the vast majority of the commercial power reactors in the US are east of the Great Plains -- is one of the few things that would get the western states' Congressional delegations to vote unanimously, regardless of party affiliation. The last time it happened was for the 1976 Federal Land Policy and Management Act.