Tracking the special Congressional elections and the partisan shift

There’s a website that has a spreadsheet of all the special elections since Trump’s been in office that also shows the swing +/- D/R from the 2016 election. But I can’t seem to find it. Does anyone know what I’m talking about? If so, can you link?

Thanks in advance!

Yer pal,
Happy

I’m gonna give this a bump just on the off-chance someone stumbling by today knows what I’m talking about and has a link to what I’m looking for.

Thanks again in advance!

Still yer pal,
Happy

Thread title changed per OP’s request.

Also, give fivethirtyeight.com a chance, Happy.

That’s it, you magnificent person!

And thank you Jonathan for the change in title.