Three days before voters head to the polls, the Democratic presidential candidate urged the crowd at a Henderson rally to "prove that we are not as divided as our politics would suggest."
He says his Republican opponent John McCain has not outlined how he would deviate from President Bush's policies.
This was Obama's 20th visit to Nevada since launching his presidential campaign. Thousands poured into the football field at Coronado High School for the 20-minute speech.
The campaign then directed supporters to nearby soccer field where they could sign up to start canvassing neighborhoods.