Actually it predates Obama, though his actions didn’t help.
WV began its move right under the final years of Clinton.
The Democrats “Green” Pandering took WV, one of the most reliably blue states and turned it Red... had Al Gore and the Dems not turned their back on Coal, FL would not have mattered in the 2000 election.
Obama’s actions certainly accelerated the Rightward movement to be sure, but the realignment of the Rust belt has honestly been LONG LONG overdue.
May the same happen in Pennsylvania.