Age also influenced the importance of a Medicare-for-all plan, with those under age 35 about 20 points more likely to prioritize it than other groups. Biden, meanwhile, is campaigning as a front-runner, relishing the one-on-one fight with Trump while making sure he doesn't ignore the demands of the Democratic primary.
Twenty-four percent of Iowa's likely Democratic caucusgoers say former vice president Biden is their first choice for president.
When you don't campaign, that's what happens.
"There's a lot of ways Trump fails the basic standard to be president - but one of them is this: Donald, it's not about you".
The clear winners in this new poll, released over the weekend, are Warren and Buttigieg.
Sanders is also often name-checked as one of the candidates with an extensive ground operation now in the works, and he remains the candidate closest to Biden in polling. Whether that is true, many ardent Democrats might very well choose to support Biden anyway, over someone such as Warren or Sanders, either of whom has a stronger left-wing reputation. New Hampshire will be the nation's first "primary" state, and Iowa will hold the first caucuses.
Biden is betting big on his electability argument, that he alone is best positioned to make Donald Trump a one-term President.
White House press secretary Sarah Sanders talks with reporters outside the White House, Tuesday, June 11, 2019, in Washington.
Inside Biden's inner-circle, that is their nightmare scenario, evoking memories of his 1988 bid that ended before Iowa and 2008, when he dropped out late the night of the caucuses. Biden will ask Iowans Tuesday. The two states also will help kill off many campaigns. His lead appears to be driven chiefly by name recognition.
The field of Democratic presidential candidates is starting to settle into tiers: Joe Biden leads the pack, and Bernie Sanders, Elizabeth Warren and Pete Buttigieg are in close competition for second place, a new Des Moines Register/Mediacom/CNN Iowa Poll shows.
"After being briefed on a devastating 17-state poll conducted by his campaign pollster, Tony Fabrizio, Mr Trump told aides to deny that his internal polling showed him trailing Mr Biden in numerous states he needs to win, even though he is also trailing in public polls from key states like Texas, Michigan and Pennsylvania".
The survey, conducted by Des Moines-based Selzer & Co. I like running against people that are weak mentally. It has Biden at 30 percent and Sanders at 23 percent.