The study used data derived from U.S. Congress stretching back more than a century.
Despite impressive early-voting results from various primary elections, some Democrats are not conformed with an older white male as the presumptive nominee, but many still back him as their candidate of choice.
The majority of Americans don't perceive Democratic presidential candidates as very religious, a Pew Research Center survey claims.
Researchers at McGill University set out to establish if influencing voters to minimize political polarization was a possibility.
Partisanship remains the most prominent differentiating factor among presidential candidates this election cycle, a recent survey suggests.
A new survey found many Republicans depict Democrats as immoral and unpatriotic, while Republicans are portrayed as closed-minded by their opposing party.