Former First Lady Nancy Reagan is inviting 16 Republican presidential candidates to participate in the CNN/Reagan Library presidential debate on September 16. Former Virginia Gov. Jim Gilmore, who participated in the debate of lower-tier candidates last week, has not yet been invited. Candidates must achieve an average of at least 1% of support in three recognized national polls before September 10 to be included in the debate, as well as meeting other criteria. The top 10 contenders who made it into the primetime Fox News/Facebook debate last week - Donald Trump, Jeb Bush, Scott Walker, Mike Huckabee, Ben Carson, Ted...