Talk of an official visit to Taiwan by House Speaker Nancy Pelosi is drawing attention and mounting push-back from China. Beijing warned it will take "strong measures" to respond if the visit occurs, possibly including military action. A trip to Taiwan would be the first by a sitting House Speaker in 25 years when then-Speaker Newt Gingrich visited the island. As second-in-line for the presidency, Pelosi's presence would send a strong signal of support for Taiwan's independence. "I think that it's important for us to show support for Taiwan. I also think that we have…none of us has ever said…