While Sen. John McCain (R-Ariz.) hangs in there, locked in a tough race with Sen. Barack Obama (D-Ill.), the Republican undercard is facing obliteration in the 2008 general elections for the Senate. Polling suggests that a massacre may be in the offing — and one that’s possibly even greater than the worst of previous GOP years: 1958, 1964, 1974, 1986 and 2006. Scott Rasmussen, whose site, www.rasmussenreports.com, follows these races closely, is producing truly hair-raising polling data. Of the open Republican Senate seats in contention, Democratic victory seems very likely in Virginia (Democratic former Gov. Mark Warner now has 55...