GOP and conservative groups account for the bulk of the more than $13.2 million spent by outside organizations on the special election in Pennsylvania's 18th District, according to Federal Election Commission filings and spending disclosures./GettyImage

GOP and conservative groups account for the bulk of the more than $13.2 million spent by outside organizations on the special election in Pennsylvania's 18th District, according to Federal Election Commission filings and spending disclosures./GettyImage

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Pennsylvania's special election isn't an isolated incident. The GOP is in trouble.

Even without a winner declared Tuesday night, it was clear based on the results what the race would tell us about the 2018 midterm elections.

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GOPer: We're in trouble

However the special election for Pennsylvania's Congressional District turns out -- and, at this writing, it remains essentially a tie, while absentee ballots are counted -- it represents a major loss for the GOP. It is the latest canary in the coalmine for the party.

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'It's not over yet:' Nail-biter Pennsylvania special election heads into 2nd day

Democrat Conor Lamb and Republican Rick Saccone are locked in a neck and neck battle to decide who will represent Pennsylvania's 18th Congressional District.