The U.S. Supreme Court has cleared the way for California to implement a new congressional map for the upcoming midterm elections, denying an emergency request from state Republicans to block its use. Enacted through the voter-approved Proposition 50, which passed by a two-to-one margin in November, the plan is projected to help Democrats secure five additional seats in the U.S. House of Representatives. Although the California GOP and the Trump administration argued the map was an unconstitutional racial gerrymander, a lower federal court previously ruled that the evidence of racial motivation was "exceptionally weak" compared to the "overwhelming" evidence of…