ATLANTA — Jordan Zimmermann took a shutout into the eighth inning and the Washington Nationals beat the Atlanta Braves 6-1 on Tuesday night to continue their season-long dominance of the division rivalry. The NL East-leading Nationals have won nine straight games in the season series with the Braves — including a three-game sweep at Washington last week. Zimmermann (6-5) ended a streak of three losses since his last win on June 2.