On the eve of the White House immigration summit a few days ago, NumbersUSA - a group determined to shut the borders to illegal immigrants -- tried to drum up donations by bashing Sen. John Cornyn and his "frightening pro-amnesty" stance. Immigrant advocates don't exactly view Cornyn as a top ally, so a fierce attack from the right is a bit surprising. He adamantly opposes anything the pro-immigrant side considers amnesty -- which would involve providing a path to citizenship for those 12 million already here. But he does favor a new guest/temporary worker program of some sort, to ease...