Commentary At present time, the United States’ southern border is wide open. Unaccompanied alien children, single alien men, and intact alien families are all pouring over en masse. Anecdotal horror stories abound: On Thursday, for instance, U.S. Customs and Border Protection tweeted: “Within 24 hours, Laredo North Station Border Patrol agents apprehended 111 individuals during 3 separate human smuggling attempts involving commercial trailers.” This is a legitimate crisis, notwithstanding self-serving presidential obfuscation to the contrary. And it is a legitimate crisis entirely of the Democratic Party’s own making. As this column has previously noted, CBP data evinced as early as last October that border apprehensions were skyrocketing in anticipation of a possible Joe Biden presidential victory. By the lame-duck period of the Trump presidency, U.S.-bound migrant “caravans” were already forming in Central America’s troubled Northern Triangle region. But what was at that time a developing issue has now predictably metastasized …