By Cathy DeDe & Mark Frost, Chronicle Managing Editor & Editor
South Glens Falls and University of Pennsylvania grad Dylan Hewitt, 32, confirmed in an interview Tuesday at The Chronicle office that he is seeking the Democratic nomination in the expected special election for New York’s 21st District Congressional seat that Elise Stefanik will resign after her presumed Senate approval as U.S. Ambassador to the United Nations.
“I’m South Glens …