Article snippet: Former Vice President MORE remains the top choice among Iowa Democrats, but his lead is slipping as two challengers build support in the crucial first-in-the-nation caucus state. Biden is the first choice of nearly a quarter of Iowa Democratic caucus-goers, according to a gold-standard survey released Saturday night by the pollster Ann Selzer. Selzer, who conducted the Iowa Poll for the Des Moines Register and CNN, found three contenders fighting for second place: Sen. MORE took 14 percent. Sen. MORE (D-Minn.) each earned support from 2 percent of those surveyed. Every other candidate in the crowded field scored at one percentage point or below. "There is clearly a top tier, with Biden leading, and Sanders, Warren, and Buttigieg wrestling for second place," Selzer told The Hill. "Kamala Harris is on the bubble." A little less than eight months before Iowa Democrats hold their caucuses, the absolute levels of support each candidate wins is less important than the trajectory their numbers show. Those trajectories are positive for Warren and Buttigieg — and distinctly negative for Biden and Sanders. The survey, conducted June 2-5 among 433 likely Iowa Democratic caucus-goers, is the third time Selzer has tested the field. In December, she showed Biden leading with 32 percent, ahead of Sanders's 19 percent. In March, Biden led the field at 27 percent, while Sanders took 25 percent. Today, Biden's support has slipped by a third from that initial survey. Sanders, whose... Link to the full article to read more