“Nobody is perfect” was the not-so-profound observation of White House press secretary Robert Gibbs over the past several days as he tried to fend off criticism of the tax troubles of three top appointees. One of the three -- Timothy Geithner -- survived congressional and public scrutiny and was confirmed as secretary of treasury. But former South Dakota Sen. Tom Daschle -- who made a bundle in speaking fees and giving advice to health-care companies after he was defeated for re-election -- felt compelled to bow out from his nomination as secretary of the Department of Health and Human Services...