Yes, but state politics ≠ national politics.
Scott Milne (R) also managed to win many counties in Vermont, does that mean Hillary will lose them? No.
Eastern Oklahoma, particularly Kiamichi Country, is basically an enhancement of Arkansas. Hence, she will appeal to enough Oklahomans to win some counties.
A better comparison to Vermont would be Utah, where she's likely to fail to win any county.
Hillary will likely win Summit County. Obama won it 56-41 in 2008. Romney's Mormon bump gave him a 50-46 win there. Even Scott Howell carried it in 2012 against Hatch.
https://uselectionatlas.org/RESULTS/state.php?fips=49&year=2012&f=0&off=3&elect=0&class=1
