Hillary Clinton has claimed victory in the Democratic Presidential nomination race over Bernie Sanders.
The 68-year-old is the first woman to ever win a major party nominee for President of the United States.
Clinton hailed the victory a milestone and tweeted it was for "every little girl who dreams big".
President Barack Obama has congratulated Hillary Clinton on securing the delegates needed to become the Democratic presidential nominee.
"Her historic campaign inspired millions and is an extension of her lifelong fight for middle-class families and children," White House spokesman Josh Earnest said in a statement.
Mr Obama also spoke to Clinton's rival Bernie Sanders and will meet with him on Thursday at Sanders' request, Earnest said.
"The president thanked Senator Sanders for energising millions of Americans with his commitment to issues like fighting economic inequality and special interests' influence on our politics," the White House said.
Bernie Sanders has vowed to "continue the fight" against Hillary Clinton in the Democratic primary.
Hillary Clinton's theme for the 22 weeks left of the campaign is 'build bridges, not walls and be inclusive not discriminatory.'
Hillary Clinton claimed victory in the Democratic Presidential race and said her win should "encourage little girls to dream big".