Hillary Clinton's selection of Sen. Tim Kaine (D-Virginia) as her running mate is already creating one distortion of reality: that Kaine is somehow a "centrist." His American Conservative Union rating score in his first three years in the Senate is 0.00. But here was The Wall Street Journal opening up its coverage tonight: The other distortion is any journalist touting Kaine as a "devout Catholic" or "traditional Catholic" without noting it would be more accurate to call him a devout and traditional Democrat. A "devout" believer in the church would champion in public its pro-life stance and its opposition to...