Democratic presidential candidate Hillary Clinton will propose nearly doubling the U.S. capital gains tax rate on short-term investments to 39.6 percent, the Wall Street Journal reported Friday. A Clinton campaign official said the Clinton rate plan would affect investments held between one and two years, which are currently taxed at a 20 percent capital gains rate, the newspaper reported. Clinton, the front-runner for the 2016 Democratic presidential nomination, will outline her plan in a speech Friday in New York.