In the few days since he returned to the White House, President Donald Trump’s sweeping executive orders and mass pardons have shattered political and legal norms. But one order is in a category of its own.

The14th Amendment was intended to correct the moral wrongs of slavery. But it has been misunderstood and reinterpreted in cases involving workdays, schools, train cars and birth control.

Multiple states and cities are suing President Donald Trump over his executive order ending birthright citizenship. Their argument is that a person born in the United States is a citizen of the United States and is protected under the 14th Amendment to the Constitution.

I pointed out that Trump's promised executive order denying birthright citizenship to undocumented immigrants was likely to be unconstitutional

Here's a guide to what birthright citizenship is, what happens if Trump's order ends it, and what comes next after lawsuits were filed.

After being sworn in as president on Monday, Jan. 20, President Donald Trump filed an executive order to terminate birthright citizenship for children of undocumented immigrants.