When will Congress start discussing changes to the tax code?

House Speaker Paul Ryan (R-WI) has said he wants to tackle tax reform in the spring, after health care reform and the spring budget pass. Senate Majority Leader Mitch McConnell (R-KY) has stated tax reform will likely occur later than that. While health care reform is proceeding rapidly, with the release of the American Health Care Act on March 6 and approval by House committees, the projected mid-April passage of the bill may be in doubt due to opposition by Democrats and some conservative Republicans.