In the Republican presidential race, Senator John McCain of Arizona solidified his grip on the party nomination with convincing victories in Maryland, Virginia, and Washington, D.C.

• 在共和党的竞选中。亚利桑那州联邦参议员麦凯恩在马里兰、维吉尼亚两州以及首都华盛顿，获得明显的胜利，巩固了他争取共和党提名的优势。