He uses his position to proselytize for the causes that he supports.
<the efforts of early missionaries to proselytize the Native Americans of Minnesota were largely unproductive>
They are a sport-shirted, discomforted lot, pacing, puffing feverishly on cigarettes, perspiring freely and proselytizing furiously. —Nicholas Dawidoff, Sports Illustrated, 19 Aug. 1991
Mormons are urged to use their social contacts with Gentiles to proselytize, by doing such favors as babysitting, running errands, and lending lawnmowers. —Malise Ruthven, Wilson Quarterly, Spring 1991
His prodigious correspondence with twenty-five hundred scientists, politicians, and men of letters … proselytized for his new science of statistics. —Daniel J. Boorstin, The Discoverers, 1983