Long-time Hillary Clinton aide Huma Abedin offered her first-ever tweet on Monday -- and it's a shot at Republican presidential contender Ben Carson. Carson is under fire for his Sunday comment on NBC's "Meet the Press" that he "would not advocate that we put a Muslim in charge of this nation." Abedin, who is Muslim, tweeted: "You can be a proud American, a proud Muslim, and proudly serve this great country. Pride versus prejudice."(continued)