WRAPUP 4-Obama eyes general election while Clinton hangs on

(Updates McCain campaign comment)

* Obama sees win in Oregon on Tuesday

* McCain finance chair resigns over lobbying ties

* Obama, Clinton backers talk about November election

By Jeff Mason

PORTLAND, Ore., May 18 (Reuters) - Democrat Barack Obama turned his attention to a general election campaign against Republican John McCain on Sunday, slamming him for having lobbyists as top advisers.

Obama has still not formally won the Democratic presidential nomination. His rival, New York Sen. Hillary Clinton, kept working to overtake him, urging supporters in Kentucky, which holds its primary contest on Tuesday, to show up at the polls.

Obama, an Illinois senator, drew his biggest crowd to date in Portland, estimated by a fire and rescue official at 75,000 people. Oregon also votes on Tuesday.

"Over the last several weeks John McCain keeps on having problems with his top advisors being lobbyists, in some cases for foreign governments or other big interests that are doing business in Washington," Obama said.

Former Texas Rep. Thomas Loeffler, McCain's national finance co-chairman, resigned his post because of lobbying ties, a McCain campaign official confirmed. He was the fifth person to leave the campaign over concern about links to lobbying.

"The McCain campaign has recently put a strict policy in place and all personnel are required to be in compliance with it. Many fine people may have a conflict that is not reconcilable," said McCain campaign spokesman Tucker Bounds.

Obama praised Clinton, but spoke of her in the past tense in another sign he has shifted focus past the primary season.

"She has been a formidable candidate. She has been smart and tough and determined and she has worked as hard as she can," Obama said of the former first lady. "She has run an extraordinary campaign."

CLINTON KEEPS GOING

The New York senator started her day by attending church and then headed off to "Get Out the Vote" rallies.

"It's not enough to show up and cheer," she told a crowd at Western Kentucky University. "You've got to get out and vote. You've got to bring everybody you can find to vote."