FILE - In this Oct. 22, 1986, file photo, lawmakers watch closely as President Ronald Reagan signs into law a landmark tax overhaul on the South Lawn of the White House in Washington. From left, are: Senate Majority Leader Bob Dole of Kansas, Rep. Raymond McGrath, R-N.Y.; Rep. Dan Rostenkowski, D-Ill., Rep. Frank Guerini, D-N.J.; Sen. Russell Long, D-La.; Rep. William Coyne, D-Pa., and Rep. John Duncan, R-Tenn. The fundamentals of tax overhaul were strong some 30 years ago. Reagan, pushed the landmark 1986 measure. Powerful and experienced congressional leaders shepherded the legislation with bipartisan support. Key players had established, trusting relationships. The situation facing President Donald Trump features none of those advantages. (AP Photo/Bob Daugherty, File)