The Republicans are trying to unseat the liberal Democrat.
Examples of unseat
unseat
Jibril chairs the executive board of the rebel council trying to unseat Gadhafi.
From the sacbee.com
He chose not to seek re-election in favor of launching a bid to unseat Jennings.
From the timesunion.com
City Auditor Hugh J. Dorrian tried to unseat Moody in a six-way primary in 1975.
From the dispatchpolitics.com
Harvey pointed out that the process began with the city's threat to unseat Long.
From the tennessean.com
In January 1969, ArizonanMorris Udall attempted to unseat and replace McCormack.
From the en.wikipedia.org
The camera is focused on the powerless masses who want to unseat their pharaoh.
From the timesunion.com
Fiorina, trying to unseat Boxer, stays true to her conservative primary stance.
From the latimes.com
He's trying to unseat a 34-year incumbent from his own party, Rep. Dale Kildee.
From the kentucky.com
All are conservative candidates hoping to unseat incumbent Democrat Patty Murray.
From the thenewstribune.com
More examples
Remove from political office; "The Republicans are trying to unseat the liberal Democrat"
Dislodge from one's seat, as from a horse
(Unseating) Said of a valve that does not remain tightly seated, but actually bounces after it closes. This commonly occurs because the valve spring is too weak. It may be accompanied by hydraulic pumping-up of the lifter, which creates poorer and poorer seating on successive closing cycles. ...