Federal records show that Michael and Donna Nicholson, parents of the candidate, both gave the maximum $2,700 donation in December to U.S. Sen. Tammy Baldwin, the Wisconsin Democrat Nicholson hopes to unseat later this year.Donna Nicholson has been a longtime Democratic financial supporter, having previously given $441 to Baldwin and another $500 to former U.S. Sen. Russ Feingold of Wisconsin. She chipped in $500 to Democratic presidential nominee Hillary Clinton.