(Tamir Kalifa |The New York Times) Former Mayor Pete Buttigieg of South Bend, Ind., a Democratic candidate for president, smiles as he is cheered by attendees at a primary night gathering in Nashua, N.H., on Feb. 11, 2020. Buttigieg is moving to replenish his campaign coffers with an ambitious schedule of 10 fundraisers held across six states in a 14-day period.