At the Northern Virginia Transportation Commission meeting on May 4, there was much angst and anger over the idea of a regional sales tax to fund Metro. Some Northern Virginia political leaders are apparently dead set against a regional sale tax. Such a tax was proposed by Metro officials and supported by the District’s chief financial officer, Jeffrey DeWitt. I believe that a regional sales tax is an eminently good idea. I say that not because I support higher taxes — I generally don’t. But…