Toomey, McGinty Crisscross Pa. in Expensive Senate Battle

(L-R) U.S. Sen. Pat Toomey and Katie McGinty. Getty Images

The candidates in Pennsylvania's down-to-the-wire U.S. Senate race are crisscrossing the state on the last day of campaigning before the election.

Republican U.S. Sen. Pat Toomey is flying around the state Monday, starting his day in Philadelphia before stops in Wilkes-Barre, Harrisburg, Johnstown and Pittsburgh before a nighttime rally in Bethlehem, near his Allentown-area home.

Democrat Katie McGinty is speaking at Monday rallies for party presidential nominee Hillary Clinton at the University of Pittsburgh and on Philadelphia's Independence Mall. The Obamas and rockers Bruce Springsteen and Jon Bon Jovi also will be at Independence Mall.

The Toomey-McGinty contest could determine whether Republicans keep their Senate majority. The too-close-to-call race is the nation's most expensive Senate campaign ever.

Republican presidential nominee Donald Trump will hold an evening rally at Scranton's Lackawanna College. Toomey hasn't campaigned with Trump or said whether he'll vote for him.

Highlights From the 2016 Campaign Trail Donald Trump and his wife Melania fill out their ballots at a polling station in a school on Nov. 8, 2016, in New York City. Mandel Ngan/AFP/Getty Images