(snip) With regard to Sen. Jim DeMint's comment that it's better to lose with 30 committed conservatives than it is to win with 60 unprincipled opportunists (or, what the media refer to as a "big-tent coalition of moderates"), he correctly reads the tax-day protest tea leaves. The Republican Party can't outspend or be perceived as more moderate than Democrats. Many conservatives and libertarians are prepared to bolt from the Republican Party at a grassroots level unless the GOP recommits to the limited government principles that Mr. Specter embraced only when politically expedient. The Journal's editors liken a 30-vote minority party...