https://arstechnica.com/tech-policy/2018/07/daily-beast-russian-hackers-targeted-democrat-facing-tough-2018-election/

The digital ink was barely dry on Ars IT and National Security Editor Sean Gallagher’s feature, "How they did it (and will likely try again): GRU hackers vs. US elections," when the Daily Beast reported yesterday’s bombshell: Claire McCaskill, among the most vulnerable Senate Democrats facing re-election this year, was one of three candidates in the 2018 midterm election targeted by the highly determined Russian intelligence agency.