DOVER, Del. (AP) — A Black political newcomer campaigning on a progressive platform has defeated the leader of Delaware’s state Senate in a Democratic primary. Social worker Marie Pinkney garnered about 52.4% of the vote in Tuesday’s primary to defeat Senate President Pro Tem David McBride in the 13th Senate district primary. McBride is one of the longest-serving lawmakers in Delaware history. He was first elected to the Senate in 1980 after spending two years in the House and had not had a primary challenger since 1986. Pinkney advances to face Republican Alexander Homich in the November general election.