EAU CLAIRE, Wis. (AP) -- Wisconsin Senator Russ Feingold still hasn't endorsed a presidential candidate. But the Democrat appears poised to endorse Senator Barack Obama, who scored a triumphant win over Senator Hillary Rodham Clinton this week.

Feingold tells the Leader-Telegram newspaper in Eau Claire that he's -- quote -- "highly inclined" to vote for Obama.

The Illinois senator beat Clinton in Tuesday's state primary, 58 percent to 41 percent.

Feingold says that's a very impressive margin. He points out the inspiration and energy that seem to follow Obama's campaign, and adds that Obama is as sharp as anyone he's met.

Feingold's name remains linked with that of the likely GOP nominee, Senator John McCain. The two collaborated on campaign-finance reform, and Feingold says McCain would make a good president.

But Feingold emphasizes that he clearly prefers either Democratic candidate because of their policy positions.