Replication Data for: 2020 US presidential forecast

Data for 2020 US presidential forecast. Includes following variables: percent of the two-party popular vote won by incumbent party (pop2pvot); president's Gallup approval rating in July of election year (julypop); percent change in GNP (nonannualized) over the first two quarters of the election year (GNPchan); percent of the Electoral College vote won by the incumbent party (ecvote).