I doubt it, as he's never lived there and is yesterday's political news. But he could siphon away enough Republican voters for Brewer to win.
In 1998, Marilyn Brewer won the GOP primary for state Assembly with 34% because two pro-life opponents split the conservative vote almost evenly. If Dornan runs, a similar outcome is plausible.
So she's pro-abortion. Great...so her endorsement by McCain was a sign of things to come.
Dornan needs to get out and help the VIABLE conservative.