The District of Columbia held its Democratic primary yesterday, and the results are mostly good news for supporters of marijuana policy reform. Below are the (unofficial) results, along with the grade the council candidates received in MPP’s voter guide: Ward 2: Jack Evans (A+) won (unopposed) Ward 4: Incumbent Brandon Todd (F) beat challenger Leon Andrews (A), 49% to 41% Ward 7: Challenger Vincent Gray (C+) beat incumbent Yvette Alexander (D), 60% to 33% Ward 8: Challenger Trayon White (C+) beat…