 "Congressional Quarterly" published a study finding that Donnelly voted with Trump's positions 62% of the time.According to GovTrack, Donnelly was the second most conservative Democrat, after Joe Manchin, and to the right of moderate Republican Senator Susan Collins.He supported progressive taxation and organized labor, but opposed same-sex marriage and abortion, even in the case of rape, during his 2012 campaign (though he supported an exception in the case of rape in the 2018 campaign).