Clinton back on campaign trail

Hillary Clinton is returning to the campaign trail following a bout of pneumonia that sidelined her for three days and revived questions about both the Democratic nominee and Republican Donald Trump's transparency regarding their health.

Clinton's campaign responded with a new letter from her doctor declaring her "fit to serve'' as president and recovering well from her illness. The letter details medications she is taking, her cholesterol levels and other results from a physical exam.

Trump says he, too, plans to release details from a recent physical, though it's unclear when that will happen and how much information he will provide. In keeping with Trump's unusual approach to transparency, he gave a one-page summary of his recent exam to Dr Mehmet Oz while taping an episode of Oz's television show.