(CNSNews.com) - Sen. Barack Obama (D-Ill.) is facing renewed criticism regarding his national security policies as he continues his campaign for his party's presidential nomination. In a YouTube video Obama made for a liberal pacifist organization last year, the senator called for major cuts in defense spending, slowing the development of future combat systems, and cutting investments in America's ballistic missile defense program. Some conservatives have expressed surprise at the degree of Obama's proposals on the video, and this past weekend, Sen. Hillary Clinton's (D-N.Y.) campaign released an ad criticizing Obama's alleged national security inexperience and trumpeting her as the...