; (2) in the case of candidates for election for the office of Senator, the Senate election share amount set forth under paragraph (2) of section 111(a); and (3) in the case of candidates for election for the office of President, the presidential election share amount set forth under paragraph (3) of section 111(a). (b) Special rule for certain Presidential elections In the case of elections for the office of President held in a year in which the incumbent is a candidate— (1) the total amount of payments made at the direction of an eligible individual to candidates and the authorized committees of candidates in primary elections for such office may not exceed 40 percent of the presidential election share amount set forth under paragraph (3) of section 111(a)