WASHINGTON (Sputnik) — The poll uses a 10-point scale in which likely US voters name a number between plus one and plus five, if they have a favorable view of a candidate, and minus one to minus five if their opinion is negative.
"In the race to the bottom," Gallup explained, "Trump's 42 percent highly unfavorable score easily outpaces Clinton's 33 percent."
Prior to the poll, the late US Senator Barry Goldwater held the bottom spot, being viewed unfavorably by 26 percent of US voters prior to his 1964 landslide election defeat, Gallup noted in a press release explaining the survey.