New Yorkâ€”Sandler Oâ€™Neill + Partners, a financial services firm, debuted the latest phase of its rebranding campaign. The campaign, with the tagline â€śThe Power of Plus,â€ť was first introduced last year to reposition Sandler as a leader in the investment banking industry. The campaign was developed by Doremus, New York. New elements include a redesigned Web site at www.sandleroneill.com, print ads in Community Banker, Independent Banker, Buy Side and Bloomberg Markets, online ads and outdoor. The budget was undisclosed.