Longtime political observer Larry J. Sabato, director of the University of Virginia Center for Politics and founder of "Sabato's Crystal Ball" political report, said the Times revelation dealt a serious blow to Democrats' hopes of keeping the seat."This is very bad news for Walsh," Sabato said in an email Wednesday. "Democrats in D.C. had hoped that incumbency, even the appointed variety, would make Walsh competitive, but Daines has led in polls and fundraising even before this damaging revelation." Sabato said November is still far off, but this news mean...