A federal appellate panel on Tuesday refused to block President Donald Trump's executive order seeking to restrict mail voting, a day after the administration asked the U.S. Supreme Court to weigh in on the proposal in a separate case. Nichols ruled that the Democrats and voting rights groups who challenged the order couldn't seek the injunction until the Trump administration issued formal regulations governing it. The Postal Service did not immediately respond to questions about what action it's taking related to Trump's executive order. Advertisement AdvertisementTrump has repeatedly tried to unilaterally change voting procedures since he took office for the second time, only to be blocked by the courts. In his March executive order, Trump directed the federal government to create a list of eligible voters and the U.S.