A Democrat familiar with the plans tells the Associated Press the campaigns of Hillary Clinton and Bernie Sanders are discussing a potential event next week in New Hampshire, during which Sanders would endorse Clinton.
The Democrat says if the two sides continue to make progress in the talks they would hold the joint event Tuesday in New Hampshire. The source was not authorized to discuss the plans and spoke on condition of anonymity.
The Clinton campaign confirmed Thursday that she will return to New Hampshire on Tuesday "to discuss her commitment to building an American that is stronger together and an economy that works for everyone," but no reference was made to a Sanders endorsement.
Sanders, appearing on Chris Hayes' MSNBC show Wednesday night, did not deny reports that there are talks of a possible endorsement.
"We are now working with the Clinton campaign," he said. "We're going to go forward together and not only defeat Trump, but defeat him badly."
Sanders praised Clinton's announcement of a proposal earlier Wednesday to tackle the rising cost of college tuition and the burden of student loan debt.
Asked when he might endorse Clinton, Sanders told reporters he was working with Clinton on some initiatives and he was hopeful they could reach an agreement "sooner rather than later."
Sanders is pushing for changes to the Democratic platform at a meeting in Florida this weekend.