There is a significant violation of health and agricultural codes here. Farmers are required to have their soil tested before growing food for human consumption.
A private farmer, whether commercial or back yard, would find himself facing substantial lawsuits. The POTUS and FLOTUS really are above the law.
But, but, according to all Barry loving media “Michelle Obama’s Harvest Garden Party, all the food grown and eaten from the White House Garden is distinctly organic and considered healthy eating. Umm, high contents of lead does the body good. /sarcasm