“They lost in the Pennsylvania Supreme Court a week ago. This is federal court.”
Nonsense. But even if it was...
“Although state supreme court rulings on matters of state law are final, rulings on matters of federal law can be appealed to the Supreme Court of the United States.“
A presidential election is a matter of federal law, so any state Supreme Court ruling can be appealed to SCOTUS.
What's nonsense? That the Supreme Court of Pennsylvania ruled against a Trump lawsuit on the 17th or that Judge Matthew Brann, who ruled against Trump in this case yesterday, is a federal judge serving in the Middle District of Pennsylvania? Or that the 3rd Circuit (a federal appeals court) ruled against Trump on a critical standing issue on November 16? I'm not sure what you're saying is nonsense.
A presidential election is a matter of federal law, so any state Supreme Court ruling can be appealed to SCOTUS.
Only if there's a federal constitutional violation. But mostly elections are questions of state law not federal law. Even if this particular case were appealed all the way to the Supreme Court and somehow they found reason to reverse it, the issue would be specific to Pennsylvania and wouldn't affect the outcome of the Presidential election.