A new poll released by St. Cloud State University indicates that DFL candidate Mark Dayton's lead over Republican Rod Grams is widening in Minnesota's U.S. Senate race. The poll of about 600 adults from October 14 to the 24th showed 47 percent of "likely voters" supported Dayton, while 30 percent supported Grams. During a debate for U.S. senate candidates in Hopkins Thursday, Grams continued his approach of trying to put Dayton on the defensive, saying many details in Dayton's proposals aren't defined. The candidates also had the opportunity to view, and respond to, their own television ads. Minnesota Public Radio's Amy Radil reports.