A Haverford College student who used a campus computer to attempt to hack into an IRS database to obtain Donald Trump’s tax returns days before the 2016 presidential election pleaded guilty Tuesday to two misdemeanor crimes in federal court. Justin Hiemstra, 22, who finished his studies in May but will not get his degree until he completes a study-abroad program next May, told Judge Cynthia Rufe that he did not know what he would have done with the tax returns if he and classmate Andrew Harris had succeeded in obtaining them on Nov. 2, 2016. “It was a time when...