Donald Trump wants to "make America great again" -- it's even written on his hat.
But when was the United States great? His supporters disagree, according to a new survey.
More than 2 percent of those polled said it was 2015 -- the year Mr Trump started using the slogan, reports the New York Times.
The single greatest year in US history, according to Trump supporters, was 2000 -- the year George W Bush won the presidential election, the dotcom bubble peaked and Limp Bizkit released Chocolate Starfish and the Hotdog Flavored Water.
Other popular individual years include 1955, 1960, 1970 and 1985. Some said 1776, the year the US declared its independence. One even said 1860, when the southern US states quit the union so they could keep slavery going.
The 1950s and 1980s were popular decades with Trump supporters and Republicans in general, perhaps because they were dominated by Republican presidents -- Dwight Eisenhower and Ronald Reagan, respectively.
Their reasons? "Strong family values", "no wars" and "life was simpler".
Democrats in the same survey preferred the 1960s and 1990s -- both of which had Democrat presidents; the former John F Kennedy and Lyndon Johnson, the latter Bill Clinton.
They also more heavily favoured recent times, citing "improving social justice" and better technology.
Supporters of Democrat outsider were more likely to hark back to the 1960s, while Hillary Clinton backers preferred the 1990s, when her husband sat in the White House.
More than 2000 registered voters were surveyed.