TULSA, Okla. — “I voted for John McCain and still would,” said Tim Driskill, in a flatly drawled declaration of certainty that still speaks for many in this place underwhelmed last November by the charms of Barack Obama, then the Democratic nominee for president.

Not a single county in Oklahoma stirred from the orderly phalanx marching behind Mr. McCain, the senator from Arizona who was the Republican nominee, and Mr. Driskill, the owner of an insurance agency in downtown Tulsa, said he was proud to be in those ranks. Statewide, two out of three voters supported Mr. McCain, the highest percentage in the nation.

But that staunchly Republican, conservative Oklahoma is harder to find now. While there are countless Mr. Driskills here — and hardly anyone doubts that Mr. McCain would easily win again in a redo of the vote — there are also new fractures and fault lines as some voters have shifted toward accepting what the rest of the country wrought in giving Mr. Obama a lopsided victory.

In interviews in the week leading up to Mr. Obama’s inauguration, many people here said a tolerant spirit toward his presidency has been hastened, paradoxically, by some of the same groups that voted mostly Republican in the election. Those include active or former military personnel, and people who identify themselves as evangelical Christians, two groups with traditions of respecting hierarchical order and strong leadership.