It was Clinton/Gore which pushed natural gas for new electric generation.
IIRC, the Bush administration has been pushing an easing of regulations so that new coal plants can be built, but you can hear the howls from the demo's.
The problem is not building the plants, the problem is in running them. How long before the Clean Air Act is modified again making compliance and coal burning impossible? Remember, the Grand Staircase/Escalonte National Monument? That trick by Clinton locked up 62 billion tons of compliant coal. We really should name the national monument the Charlie Trie Monument because Trie represented an Indonesian billionaire who exports compliant coal.