Commentary Biden administration health official Rochelle Walensky announced Monday that vaccinated Americans can visit with others who are vaccinated in small groups at home. But when Walensky was asked about visiting grandchildren, she said no, unless the kids are local. Even vaccinated people must avoid traveling. “Every time there’s a surge in travel, we have a surge in cases in this country.” The Biden administration is making one exception. It’s OK to wade across the Rio Grande River and enter the United States illegally. Even if you have COVID-19, you can get on a bus in a Texas border town and travel to any part of the United States, including New York, Baltimore, Miami, and Los Angeles. Never mind how far and wide COVID-infected migrants spread the virus as they fan out. On the travel question, the double standard is mind-boggling. It’s no to Grandma, but OK for illegal immigrants. …