Cooper Allen

USA TODAY

More than a month after the end of the last round of state primaries, it appears the Democratic presidential race between Hillary Clinton and Bernie Sanders is officially set to conclude.

The Sanders campaign released a statement Monday morning confirming what had been widely expected for days: The Vermont senator will join Clinton at a rally in Portsmouth, N.H., on Tuesday where he's expected to endorse her.

The statement says the two will "discuss their commitment to building an America that is stronger together and an economy that works for everyone, not just those at the top."

Since Clinton became the presumptive Democratic presidential nominee in early June, Sanders has been inching closer to an endorsement, even while officially continuing his own campaign.

Late last month, he said he planned to vote for Clinton against Donald Trump in November.

More recently, Sanders has won sought-after policy concessions from Clinton, including on her plan to offer free in-state college tuition to families making $125,000 or less and this weekend on health care as the Democratic Party worked on its platform during meetings in Orlando.

Hillary Clinton offers health care proposal sought by Bernie Sanders