Underscoring the importance of the Hispanic vote, the McCain campaign is going on the air with a new ad that makes a specific appeal to the rapidly growing demographic. In the one-minute television spot, entitled “God’s Children,” Mr. McCain refers to the military service of Hispanics in wars, past and present. He asks Americans to “remember that these are God’s children. They must come into our country legally, but they have enriched our culture and our nation as every generation of immigrants before them." The ad, which will appear in Colorado, Nevada and New Mexico, features scenes of the Vietnam...