It doesn't. They are comparing the 2016 presidential election numbers, to a mid-term election, and a special election at that. 40% turnout probably was expected.
For the democrats to get 87% - that's the fraud. They manufactured the votes. I'll guarantee you 87% of the 2016 voters didn't cast their own votes.
I think people are confused with these numbers. The 87% is the number of the 2016 voters that turned out to vote in this election, not 87% of the eligible Dem voters. Similarly the 40% is of the 2016 totals that voted. So Dems got a much higher percent of their 2016 voters to the polls than Republicans did. This is fixable. If I were a Repub in this district I got a wake up call last night and would show up in November. I think close races like these are just what a complacent GOP needs to get out the vote. Not buying the blue wave. In my opinion they will win their traditionally held seats in Blue districts by large margins, but will have little effect on Trump held districts