Republican Congress passes an act for those lands excepting those needed for national defense, government installations and national parks revert back to the states = step one.
Step two: Send it to Obama for his veto. Send it back to Congress to override his veto. Any western state democrat that does not vote to override the veto just became a loser in the next election.
Step three: If the veto is not overridden do it again in two years with a Republican President to sign it. Any Rinos that do not vote for it should be primaried.
The word you're looking for is "transfer," not "revert."
Using revert is every bit as false as Muslims using the same word to refer to converts.