Despite a pandemic, a looming cold war with China, and the harshest economic crisis since the Great Depression, President Donald Trump still has room on his plate for provoking a war with Iran. That is the only plausible interpretation of his decision, reported by the Washington Post this week, to end the sanction waivers that allow Russian, Chinese, and European companies to do work at Iranian nuclear sites. The odd thing about this decision is that those companies were helping to prevent Iran from reviving its nuclear program. With the waivers removed, the brakes will be lifted, and Iran is likely once again to…