Democratic U.S. Sen. Bob Casey of Pennsylvania and Republican challenger David McCormick met Thursday for their first debate in the pivotal race for a swing-state seat, with each candidate repeatedly accusing the other of lying and turning questions about energy, the sale of U.S. Steel and tariffs into personal attacks.

The Republican challenger trying to flip the U.S. Senate seat in swing-state Pennsylvania said he’ll press for U.S. military action in Mexico to target fentanyl trafficking networks, a controversial and complicated idea that seemed to originate with former President Donald Trump.

A Republican-controlled county in Pennsylvania violated state law when election workers refused to tell voters whether their mail-in ballot would be counted in April’s primary election, an appeals court ruled Tuesday.

 Republicans are stepping up scrutiny of Pennsylvania’s system for registering people to vote through its driver’s licensing centers, six weeks before what is expected to be a close presidential contest in the battleground state.

Before he ran for the U.S. Senate in Pennsylvania, David McCormick was a big name on Wall Street.

Pennsylvania’s Supreme Court on Monday upheld a lower court ruling that rejected a bid to get independent presidential candidate Cornel West on the ballot for the November election in the battleground state.