Eight days to go before Election Day — but already hundreds of thousands of Massachusetts residents have cast ballots during the state’s first-ever early voting period. And Monday marks a key deadline for political campaigns to file reports with the state about their contributions and expenses.

Click the audio player above to hear NEPR’s Carrie Healy speak with Matt Murphy of the State House News Service. Carrie asked Matt whether those campaign finance reports will be a good predictor of the results on November 8th.