https://resolver.library.columbia.edu/clio4996822

CQ Press offers primary and general election data for all presidential, gubernatorial or congressional elections from 1789 – 2016. 2018 midterm returns with be verified and uploaded in 2019. As a secondary source, CQ Press takes the raw data from election results and makes it easier to read and digest.

PROS
– Comprehensive
– Download by format

CONS
– Secondary source (pulls from ANES)
– Slow to update