As the deadline nears for the ITC's ban on some older models of iPhones and iPads to take effect, a growing chorus of companies and individuals have begun calling for an overturning of the ban by the Obama administration in the wake of a lack of action. Two Republican and two Democratic senators have signed a letter urging United States Trade Representative Michael Froman (who has been delegated the decision) to reverse the ITC ban, mostly on the grounds that sales injunctions over Standards-Essential Patent (SEP) disputes are unnecessary.