SurveyUSA’s first November general election poll conducted of likely voters shows John McCain losing to either Barack Obama or Hillary Clinton in Washington state, but by different margins.

Obama beats McCain by 13 points if the election were today, 53% to 40%.

Clinton beats McCain by 3 points today, 48% to 45%.

• Among men: Obama leads McCain by 7;  McCain leads Clinton by 7.
• Among women: Obama leads McCain by 19; Clinton leads McCain by 14.
• Among voters under age 50: Obama leads McCain by 20; Clinton leads McCain by 2.
• Among voters aged 50+: Obama leads McCain by 7; Clinton leads McCain by 4.
• Among white voters: Obama leads McCain by 9; Clinton leads McCain by 2.

Research conducted 4/14 through 4/16, exclusively for KING-TV in Seattle and KATU-TV in Portland Oregon. Full results are here.