With a pronounced independent streak to match his political alignment,Bernie Sanders of Vermont may be another headache for Democratstrying to cobble together 60 votes for healthcare reform in the coming weeks.At a time when most attention is being paid to the Senate's other, more well-known Independent, Connecticut's Joe Lieberman, it is Sanders who could end up playing spoiler for Majority Leader Harry Reid (D-Nev.). As Reid struggles to find 60 votes that will unite on procedural votes, his party's centrists are pulling the healthcare bill politically rightward while Sanders is staking out a far-left position. Asked if he will support Democrats on procedural votes once the healthcare bill hits the Senate floor, Sanders was repeatedly...