A new poll finds Mark Dayton leading the pack of DFL US Senate candidates. Dayton was favored by 27 percent of likely primary voters responding to the Saint Paul Pioneer Press, KARE11, and Minnesota Public Radio poll. Mike Ciresi had 18-percent, Jerry Janezich had 17-percent and Rebecca Yanisch had 13-percent. About one-fourth of the respondents were undecided. MPR political analyst Chris Gilbert says Dayton's nine point lead is not massive, given the poll's five point margin of error. But he says in a crowded field it's good to have any lead.