Hillary Clinton scored a consolation win in Tuesday's Kentucky primary, but Barack Obama remained on course to surpass a milestone toward the Democrats' White House nomination.
  
Television networks projected the former first lady would be the big winner in the bourbon and horseracing state of Kentucky, whose blue-collar voters and older women formed the same kind of pro-Clinton coalition seen in other states.
  
But Obama was tipped to take the liberal western state of Oregon, where voting was ending at 0300 GMT Wednesday, and clinch a symbolic majority of elected delegates after nearly six months of Democratic nominating battles.
  
Asked earlier if she might bow out of the race Tuesday night, Clinton said "not a chance" before heading to a victory rally here.
  
Obama, cementing his bid to be the party's champion in November's presidential election showdown against Republican John McCain, was set for his own rally in Iowa, the scene of his shock win in the first nominating contest.
  
The Iowa event was to remind Americans "that this was a very unlikely journey that we've taken," Obama told MSNBC, while attacking McCain for offering a "third term" for President George W. Bush.
  
But fearful of provoking the combative Clinton, the Obama campaign denied it was adopting a triumphalist tone.
  
"We don't have time to not be unified," the candidate said on a day that Senator Edward Kennedy, the liberal lion and elder of the political dynasty, was diagnosed with a malignant brain tumor.
  
"But in the meantime, I am confident that the Democratic Party is going to come together, and partly because of those issues that Ted Kennedy cares so deeply about," Obama said.
  
According to RealClearPolitics.com, Obama had 1,610 pledged delegates heading into Tuesday's primaries, just 17 short of a majority on the final stretch before the Democratic primary campaign ends on June 3.
  
With party elders known as "superdelegates" thrown in, the independent website said he had 1,915 delegates in total -- so he needs 110 more to reach the ultimate winning line of 2,025.
  
A total of 103 delegates was up for grabs in Oregon and Kentucky.
  
The New York senator's campaign chairman, Terry McAuliffe, said earlieer the Kentucky outcome would be enough to give superdelegates reason to doubt Obama's capacity to win against McCain in November.
  
"You want to beat Hillary? Beat her. That's the only way you're going to beat Hillary Clinton," he said on MSNBC.
  
McAuliffe turned to no lesser an authority than Karl Rove, Bush's long-time counselor and a hate figure for most Democrats, to burnish his arguments about electability.
  
An electoral map prepared by Rove's consulting firm and leaked to the press showed Clinton beating McCain easily in November. The race with Obama as the Democratic nominee was suggested to be much tighter.
  
But that contention, and Clinton's claim that she now leads in the popular vote including disputed primaries in Florida and Michigan, has not cut much ice with party elders as superdelegates continue their drift towards Obama.
  
McCain was already anticipating a November faceoff with Obama, using a speech in Miami to savage the Democrat's Cuba policy, a day after accusing him of a "reckless" misreading of the threat from Iran.
  
Obama's willingness to hold talks with the Castro regime and to ease the US trade embargo on Cuba "would send the worst possible signal to Cuba's dictators," the Republican said.
  
Speaking on CNN, Obama said he would not offer summit talks with Cuba or Iran without preparations by lower-level diplomats beforehand, and reiterated his charge that "Bush-McCain" diplomacy had "failed."
  
The occasion for McCain's speech was Cuba's independence day and the venue was in the state of Florida, a pivotal battleground for the November election where Obama was planning to spend the rest of the week from Wednesday.
  
The trip was to be Obama's first serious bout of campaigning in the Sunshine State, whose primary results, like Michigan's, were voided by Democratic bosses over a scheduling row.
  
Heading to the final contests in Puerto Rico, Montana and South Dakota, Clinton's hopes hinge in large part on getting the Florida and Michigan delegates reinstated at a Democratic National Committee meeting on May 31.