Palin will appear at a rally at New Egypt Speedway in New Egypt, N.J., on Saturday.
De Blasio holds huge leads among black and Hispanic voters and leads by double digits among political independents.
De Blasio was Hillary Clinton's campaign manager in her 2000 Senate campaign.
Massachusetts special election candidate Carl Sciortino (D) is out with one of the more interesting campaign ads we've seen.
Bill de Blasio is still over 40 percent as the final votes are being tallied, suggesting he would have avoided a runoff anyway.
Bloomberg has been openly critical of Democratic leader Bill de Blasio.
"And when tragedy struck, he was there every step of the way."