I’m not not very aware of it, but how supportive can he be if he endorsed and worked for Trump with one of the toughest policies on the matter? When the GOP establishment was out there rushing to condemn Trump, Christie stood by him. Pence publicly criticized Trump’s Muslim policy.
Here’s one of many articles on the subject. Given CAIR’s terrorist ties, see if the below excerpt doesn’t concern you:
‘In 2013, the Council on American-Islamic Relations (CAIR) named Christie to their “Best List,” identifying him as one of the most outstanding public officials in the nation for his work to enhance relations between Muslims and other Americans.’
http://www.newsmax.com/t/newsmax/article/706704