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MIAMI (CBSMiami/AP) – Former Democratic rival Bernie Sanders will join Hillary Clinton at a New Hampshire event where he’s expected to formally endorse her.

Clinton’s campaign is holding the event Tuesday at a high school in Portsmouth. Sanders defeated Clinton by a wide margin in New Hampshire, in the nation’s first primary.

Sanders’ endorsement will come a month after the final primary. He’s pushed for policy agreements on higher education, health care and a $15 an hour federal minimum wage. Some of those policies were included in a draft of the party’s platform in Orlando over the weekend.

On Monday, a powerful labor union that previously supported Sanders announced its formal backing of Clinton for president.

The Communications Workers of America, which represents 700,000 telecommunications and technology members, said in an emailed statement that Clinton “has stood with CWA members and pledges her commitment to making life better for working families.”

The endorsement came after Clinton and Sanders announced a joint event in New Hampshire Tuesday.

In a statement, Clinton thanked the union for their backing, pledging to “stand with the CWA to protect workers’ fundamental rights to organize, to bargain collectively, to be safe on the job, and to retire with dignity and security after years of hard work.”

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