As detailed in this story on Politico, there is a possibility -- though, by no means a certainty -- that while working as a model in the early nineties, Melania Trump illegally committed a visa violation by working while on a tourist visa.

However, we, the undersigned, recognize that the immigration system in place in the US is complicated and often unfair to migrant workers. It is desperately in need of reform. We also recognize that the United States is a nation that has always sought to welcome those who would join our great experiment, regardless of nation of origin, regardless of race, regardless of religion. Indeed, many of us are ourselves the descendants of immigrants, and we know that we are stronger together. We are deeply grateful and humbled that Melania and immigrants like her seek out our the land of opportunity.

So, President Obama, we call on you to recognize that love trumps hate, to look beyond politics, and to embrace the deep well of forgiveness that is essential to the American spirit. We call on you to issue a pardon without condition to Melania Trump for any visa violations or other immigration related illegalities she may or may not have committed.