Elsewhere on Monday, Professor Stanley Wells, chairman of The Shakespeare Birthplace Trust, unveiled a newly identified portrait of the Bard.

BBC: Shakespeare's first theatre found

For companies that leave the U.S., the appeal of lower taxes "is still there, but people now are also getting more concerned about where tax reform is going, " says Bret Wells, a University of Houston law professor.

WSJ: U.S. Firms Move Abroad to Cut Taxes