Looking ahead to Oregon’s May 20 primary, SurveyUSA shows Barack Obama ahead of Hillary Clinton by 50 percent to 44 percent with 4 percent undecided. The poll was conducted April 28-30 and has a margin of error of 3.9 percent. Obama had led by 10 points three weeks ago. Obama has a big lead among men voters while he and Clinton are relatively close among female voters. For the 36 percent of voters who called the economy the top issue, Clinton leads 49 percent to 46 percent, but for the 23 percent who cite Iraq, Obama is favored 61 percent to 36 percent. Although Clinton usually scores big margins among voters who are most concerned about health care, she is statistically tied with Obama on that issue leading him 51 percent to 38 percent. Seventeen percent of voters named that issue as the top one.

The other state voting May 20 is Kentucky where a previous poll showed a big Clinton lead.