President Joe Biden will nominate former GOP Sen. Jeff Flake as his ambassador to Turkey, choosing a Republican to lead one of the U.S.’ most important and delicate foreign relationships. Flake, who served as a Arizona senator from 2013 to 2019 and vocally supported Biden over former President Donald Trump, said he was “honored and humbled” in a statement. “Given the strategic importance of the United States’ relationship with our long-time NATO Ally, the Republic of Turkey, I am honored and humbled by the trust President Biden has placed in me with this ambassadorial nomination,” Flake said. “This is a pivotal post at an important time for both of our countries.” Flake, a former member of the Senate Foreign Relations Committee, is not the only Republican Biden has named to a post abroad. He named Cindy McCain, the widow of the late Arizona Sen. John McCain, to be the U.S. representative to the United …