. >> reporter: now mckay faces joe galdo in the november election. his supporters here tonight are calling him the fairfax county board chairman. bacto you in the studio. >> julie carey, thank you. >> we have more results across north virginia. you can see them right now on a our nbc wshington app. >>> virginia results could tell us a lot about the 2020 race. iowa voters got the preview of what could behe general maelection hup. joe biden both spoke to voters in a iowa took shots at each other, president trump and joe . bide >> a lot of fireworks today. a new head to head, biden leads trump by 13 points in a hypothetical matchup. he's also the top choice among democratic voters. president trump taking notice of that. twore in the same stage but had non-profit messadiffere tonight. biden says he wants to quote "make america, america again." that's the presidt's slogan. president trump calling biden sleepy joe. >> i rather runai agst biden, i think he's the weakest mentally. >> he o tweets attackbeth miller? id the first debate among democratic prestia