They are staunch supporters of the Republican Party.

他们是共和党的坚定支持者。

youdao

They praise her as a McCain-style reformer who has taken on her state’s Republican establishment and has a staunch pro-life record (her fifth child has Down’s syndrome).

佩林发迹于地方的家长教师会，后来当选美国面积最大州的州长、他们称赞她是麦凯恩式的改革家，担任美国共和党要职，有着坚决的反堕胎立场（她的第五个孩子患有先天性愚症）。

youdao

He made clear he sees a battle for the heart and soul of the Republican Party between moderates like himself, and staunch conservatives.

VOA: standard.2009.05.24

It's no secret Rove is both a staunch Republican and a John McCain supporter.

FORBES: Magazine Article

Even though Ivers said he was a staunch Republican, he said Wednesday that he was leaning toward sticking with Buchanan, regardless of his decision.

CNN: Des Moines Register: Buchanan closing Iowa office

Tom Coburn, a staunch Republican from Oklahoma.

FORBES: The Senate