WASHINGTON, June 5 (Xinhua) -- Despite all the talks about the Obama-Clinton "dream ticket," Hillary Clinton is not seeking to be the running mate of presumptive Democratic Party nominee Barack Obama.

    "She is not seeking the vice presidency, and no one speaks for her but herself. The choice here is Obama's and his alone," said a statement from the Clinton campaign on Thursday.

    "Clinton has made it clear throughout this process that she will do whatever she can to elect a Democrat to the White House," it added.

    Illinois senator Obama clinched his party's nomination on June 3 on superior delegate strength.

    In an email sent to her supporters, Clinton confirmed reports that she will end her presidential bid and endorse Obama Saturday.

    "On Saturday, I will express my congratulations to Senator Obama and my support for his candidacy. This has been a long and hard-fought campaign, but as I have always said, my differences with Sen. Obama are small compared to the differences we have with Sen. McCain and the Republicans," the letter said.

    "I have said throughout the campaign that I would strongly support Sen. Obama if he were the Democratic Party's nominee, and I intend to deliver on that promise," the letter added.

    Clinton spokesperson Howard Wolfs on and other aides said she would express support for Obama and for unity within the party at an event in Washington.

    However, it is still unknown whether it will be an unconditional quitting or just a suspension of her campaign.

    There has been a lot of talk about a joint Obama-Clinton presidential ticket since the Illinois senator clinched the Democratic nomination.

    In fact, some Clinton supporters are strongly pushing the issue.

    However, Obama has refused to make any comments on the matter, setting up a committee instead to zero in on possible running mates.