Sen. Hillary Clinton said Saturday "we need to do all we can" to help elect Sen. Barack Obama the next president of the United States."The way, the way to continue our fight now, to accomplish the goals for which we stand is to take our energy, our passions, our strengths and do all we can to help elect Barack Obama, the next president of the United States," she said of her former rival for the Democratic presidential nomination during a speech at the National Building Museum in Washington."Today, as I suspend my campaign, I congratulate him on the victory he has won and the extraordinary race he has run. I endorse him and throw my full support behind him. and I ask all of you to join me in working as hard for Barack Obama as you have for me."Earlier, she said "this isn't exactly the party I planned, but I surely like the company and I want to start today by saying how grateful I am to all of you ... to all those women in their 80s and their 90s born before women who could vote who cast their votes [this year]""I will continue to stand strong with you ... the dreams we share are worth fighting for," she added.Clinton's campaign tells CNN that 6,000 people signed up on the New York senator's Web site to attend the speech.