David Carroll tweeted "... effects cannot be measured. There are no control groups in elections" [1]. His stake in it was getting access to his data though, not

David Carroll tweeted "... effects cannot be measured. There are no control groups in elections" [1]. His stake in it was getting access to his data though, not coming at it from a data science perspective. I'm not sure I agree with his assessment about it not being measurable though. [1] https://twitter.com/profcarroll/status/1161446789850906624 https://twitter.com/profcarroll/status/1161446789850906624