Sharpton is also speaking with Hillary Clinton the same day.
The Texas senator slammed his GOP rival for supporting "socialized medicine."
"I would have to have major philosophical alignment with whoever it was," he said.
"That has no place in politics today," Jane Sanders said.
Hillary Clinton herself is not attending the two Wednesday events.
Surprising finishes in New Hampshire could elevate them to the stage.
The demonstrator was mocking Rubio's repetition at Saturday's debate.
The ice cream makers released a video urging New Hampshire to "do it for Bernie."
The super-PAC hired the agency that coordinated President Obama's African-American paid media.
The accidental online post was made before voting has ended.