On one side of the split is J.D. Vance, who has sought to parlay his celebrity as the author of “Hillbilly Elegy” into a Senate seat.

On the other is Jane Timken, a former state party chair who represents the closest thing in the race to an establishment candidate.

Timken has run a campaign focused on inflation, immigration, “parents’ rights” and crime. On Ukraine, she put out a statement Monday that was perfectly in tune with the Senate Republicans she hopes to join: supporting Ukraine’s sovereignty and calling for sanctions on Russia, while condemning Biden for what she called “weak and feckless leadership.”

But Vance, a Yale Law School graduate who served in the Marines in Iraq before becoming a venture capitalist, staked out a wildly different position.

“I don’t really care what happens to Ukraine one way or another,” Vance said in a podcast interview.