More than a month after losing the Democratic presidential nomination, Vermont Sen. Bernie Sanders endorsed Hillary Clinton as his party’s nominee. His endorsement solidifies the former secretary of state’s hold on the Democratic party.

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Sanders and Clinton appeared together in Portsmouth, New Hampshire, proclaiming that Clinton has won the Democratic nomination and he congratulates her for it. He added that he intended to do everything he could to make sure she is the next president of the United States.

“I have come here today not to talk about the past but to focus on the future. That future will be shaped more by what happens on Nov. 8 in voting booths across the nation more than any other event in the world,” Sanders said. “I have come here to make it as clear as possible as to why I am endorsing Hillary Clinton and why she must become our next president.”

The former Clinton rival said that she understands what the country needs and has what it takes to improve the nation’s economy and health care system.

“Hillary Clinton will make an outstanding president and I am proud to stand with her here today,” Sanders said Tuesday.

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As expected, the senator took no time to criticize Donald Trump and the GOP candidate’s views on the economy and climate change.