Sen. Bernie Sanders of Vermont will join Hillary Clinton at a campaign rally in New Hampshire on Tuesday, where he is expected to endorse his former rival.

Sanders is joining Clinton at Portsmouth High School to “discuss their commitment to building an America that is stronger together,” according to a Clinton campaign release, but the self-proclaimed Democratic socialist is expected to formally endorse Clinton at the event. Sanders beat Clinton during a primary contest in the Granite State by 22 percentage points.

Though Sanders said repeatedly that he would vote for Clinton in the general election after her edge on him grew so significant that she was deemed the presumptive Democratic presidential nominee, he has not yet endorsed. His goal was to keep the pressure on Clinton and the Democratic party to adopt more of his policy proposals. After Clinton announced last week that she would be pushing a tuition-free college plan, a pillar of the Sanders platform, an endorsement seemed more likely.

Over the weekend, Sanders also met with Democratic Party leaders to push his platform agenda at a meeting. After that meeting, he told reporters his campaign and the Clinton campaign were getting “closer and closer,” the New York Times reports.

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