Sen. Patty Murray, D-Wash., in a pre-Memorial Day weekend e-mail to prospective donors, is asking them to pony up money to the Democrats before you take off for the weekend.Its one of four increasingly frantic appeals sent out during the past week by the Democratic Senate Campaign Committee (DSCC), which Murray chairs. All of them use as bogeyman former Bush political guru Karl Rove and those described by Murray as Roves people.If we can raise another $1 million by next week, we can keep pace, says Murray. Can you help out with $5 before the long weekend begins?Rove is co-founder...