Republican presidential candidate Rick Santorum -- in a neck-and-neck race with Mitt Romney in Michigan -- joined his rival in releasing new TV ad footage on Tuesday aimed at the state's voters. Santorum's spots tout him as a "trusted conservative" and the choice of supporters of the "tea party" movement, social conservatives and evangelical Christians, all important elements of the Feb. 28 primary in Romney's home state. One of the ads uses mainly written words -- praise in the form of quasi-endorsements and favorable quotes -- from Glenn Beck and Rush Limbaugh, among others -- over an urgent sounding symphonic...