It’s enough to make a budget hawk lose his feathers. Notwithstanding President Obama’s promise in his State of the Union address to freeze domestic discretionary spending for five years, Vice President Joseph Biden Tuesday proposed $53 billion in high-speed-rail projects — atop $8 billion so previously “invested.” This is every boy’s dream: the ultimate train set. Thank you, Santa! For their part, congressional Republicans struggle to find $100 billion in budget cuts, even though their promise to do so fueled their historical election victories last November. So far, they have proposed just $74 billion in cuts for fiscal year 2011,...