This weekend, at the D-F-L convention in St. Cloud, democratic candidates will vote yes for a political prize whose value is in dispute. The D-F-L and Republican endorsements represent the choice of people who are active in party politics, but the endorsements are no guarantee of winning either the primary election in September or the general election. Minnesota Public Radio's Bill Catlin reports. --------------------------------------------------------- | D-CART ITEM: 2313 | TIME: 4:08 | OUTCUE: SOC --------------------------------------------------------- The endorsement typically bring with it party money, voter and donor lists, get-out-the vote activities, and sample ballots; political assets that otherwise would cost candidates hundreds of thousands of dollars. Hen