The phrase "a staunch backer" is correct and usable in written English.
It can be used to describe someone who is a strong and loyal supporter of a person, cause, or idea.
Example: "She has always been a staunch backer of environmental conservation efforts, advocating for sustainable practices in her community."
Alternatives: "a firm supporter" or "a strong advocate".
He's a staunch backer of Goldman Sachs, for all its ethical failings.
During their initial discussions about organizing the meeting, the Russians argued that Iran, a staunch backer of the Assad government, be included.
That may have backfired: Mr D'Alema, a staunch backer of ISAF, angrily dismissed the move as interference by outsiders in Italy's democracy.
Attiyah said it was up to Syrians to decide whether Iran, a staunch backer of the Syrian government, should be invited to Geneva.
In April, the Fanjul family hosted a fund-raiser for Senator Marco Rubio, of Florida, another candidate for President and, despite his ties to the Tea Party, a staunch backer of price supports for sugar.
Sarah Kovner, the former Clinton administration official who hosted the event and is a staunch backer of Ms. Gillibrand, was especially blunt: "We don't need this primary," she told Mr. Kramer, according to people who heard the conversation.
Ex-President Sali Berisha, a northerner and staunch backer of the Kosovar struggle, made a clumsy attempt to regain power by force last autumn; his heavily armed supporters may have another go if they feel the Kosovo crisis has strengthened their hand.Also at risk from the war next door could be Albania's status as an oasis of religious tolerance in a sea of sectarian hatred.
Mr. White's remarks came with Mr. Perry, a Republican and staunch backer of the death penalty, under criticism for not granting a 30-day reprieve to Cameron T. Willingham in 2004, when an arson expert working with Mr. Willingham's defense concluded that the evidence that had put him on death row was seriously flawed.
Similarly, The Toronto Star, Canada's largest-selling newspaper and a staunch Liberal Party backer, gave only a "reluctant endorsement" of Mr. Chretien.
"He's preaching to the choir," said Representative Debbie Wasserman Schultz of Florida, once a staunch Clinton backer, "and we're ready to sing".
One former senator who was a staunch Gore backer said he was relieved that Mr. Bush was president because he feared that the former vice president would think he had all the answers.
