There are non-trivial legal and freedom issues involved in considering such a measure, of course, but the fact that there are Muslims in the United States advocating for a ban on the implementation of Sharia law here, as described in this article on The Blaze, gives me hope. From the “American Islamic Leadership Coalition“‘s website:

As American Muslims, we believe that the law should treat people of all faiths equally, while protecting Muslims and non-Muslims alike from extremist attempts to use the legal instrument of shari‘ah (also known as Islamic jurisprudence, or fiqh) to incubate, within the West, a highly politicized and dangerous understanding of Islam that is generally known as “Islamism,” or “radical Islam.”

…

As American Muslims we are conscious of the fact that Muslim Brotherhood legacy groups and other Islamists and their surrogates in the U.S. are trying their best to portray any opposition to manifestations of shari‘ah law as “racism” and “discrimination against Muslims.” However, as a coalition of traditional, liberal and secular Muslim Americans, we denounce this fear-mongering and playing of the race card, which only serves to mask the Islamists’ highly politicized agenda.

…

“Many of us fled the Muslim world to escape Shariah law… We do not wish these laws to follow us here.”

More from groups like this, please.