Who is Sam Braxton from The Mark of the Assassin: A Novel and what is their importance?

Managing partner of a prestigious Washington D.C. law firm, Sam Braxton is a political conservative who is willing to violate both ethics and the law in order to further his political ambitions. He has reluctantly employed Elizabeth Osbourne, whom he detests because of her liberal political views, because of pressure from other partners to have the balance of a female and a liberal in the firm.