The American Council of Trustees and Alumni (ACTA) fights for open inquiry and free expression. ACTA is concerned with MIT's lack of protection for free speech; MIT does not meet ACTA's Gold Standard for freedom of expression. See ACTA's analysis here.
Below is an ACTA video highlighting MIT's struggles with free speech.
ACTA argues that viewpoint diversity is at the heart of the process by which universities advance knowledge -- and that promoting it is especially important at MIT.