Thomson Reuters
At the time of her speech, the Democratic presidential frontrunner was projected to win Alabama, Arkansas, Georgia, Tennessee, Texas, and Virginia.
Clinton repeated lines she's used before to emphasize how she differs from Trump, the Republican frontrunner.
"Instead of building walls, we're going to break down barriers and build ladders of opportunity and empowerment so every American can live up to his or her potential," Clinton said, in an implicit attack on Trump's calls to build a wall on the southern border of the US to prevent illegal immigration.
She also took a shot at Trump's campaign slogan, "Make America Great Again."
"We know we've got work to do. It's not to make America great again," Clinton said. "America never stopped being great. We have to make America whole ... and fill in what's been hollowed out."
Clinton also referenced the rhetoric from Republicans as a whole.
"It's clear tonight that the stakes in this election has never been higher," Clinton said. "And the rhetoric we're hearing on the other side has never been lower. Trying to divide America between 'us' and 'them' is wrong and we're not going to let it work."
She pushed a message of unity while portraying Republicans as divisive.
"Whether we like it or not, we're all in this together, my friends," Clinton said. "And we all have to do our part. But unfortunately, too many of those with the most wealth and the most power in this country today seem to have forgotten this basic truth about America."
Clinton's primary opponent, Bernie Sanders, had given his own victory speech earlier in the night despite having only won his home state of Vermont at the time. Sanders would later be projected to win Oklahoma shortly after Clinton finished her speech.