Clinton, 68, appealed to supporters of party rival Bernie Sanders, 74, to join her campaign. She said Democrats had been bolstered by his campaign for eradicating income inequality, which has commanded huge crowds and galvanized younger voters. Not yet ready to concede, Sanders vowed to fight on.
Clinton also harshly attacked Donald Trump, 69, her presumptive Republican rival in the Nov. 8 presidential election, for using divisive rhetoric that belittled women, Muslims and immigrants. She took specific aim at his condemnation of an Indiana-born judge of Mexican heritage.
"The stakes in this election are high and the choice is clear. Donald Trump is temperamentally unfit to be president and commander-in-chief," Clinton said.
"When Donald Trump says a distinguished judge born in Indiana can't do his job because of his Mexican heritage, or he mocks a reporter with disabilities, or calls women pigs, it goes against everything we stand for," she said.
A Reuters/Ipsos poll released on Tuesday showed Clinton leading Trump by 10 percentage points nationally as they launch their general election battle, little changed from a week earlier.