Barack Obama leads Hillary Clinton in Oregon by 52 percent to 42 percent, according to a SurveyUSA poll conducted April 4-6. The balance of error is 4.1 percent. Oregon holds its primary May 20. Obama has almost a 2-to-1 lead over Clinton among men voters while her advantage among women is 50 percent to 43 percent. The biggest age gap between the two is among voters in the 35-to-49 bracket where Obama leads, again, by almost 2-to-1.

Oregon is one state where Iraq rivals the economy as the top issue, with 30 percent naming the economy and 27 percent citing Iraq. Among those most concerned about the economy, Oregon Democrats divide evenly among Clinton and Obama, but prefer Obama on Iraq by 61 percent to 32 percent.