WHY DOES THIS WEBSITE INCLUDE only Democrats and Republicans and not the Green or Libertarian Party?  

This site focuses on the major party candidates because one of them will be our next president. Under our current voting arrangements, third parties can be spoilers but not winners at the presidential level. This is not a year for protest votes, disturbing as the current options are to some of us. Remember Florida in 2000, which put George W. Bush in the White House. In that contest, the Green Party got 97,488 votes, the Libertarians got 16,415, and Bush was ahead of Gore by 537 votes at the point at which the Supreme Court stopped a recount in Bush v. Palm Beach County Canvassing Board, 531 U.S. 70 (2000) and Bush v. Gore, 531 U.S. 98 (2000). Johnson’s positions on disability issues are similar to Trump’s: far less spending and far less federal oversight. Stein expresses more concern but her plans are far less detailed than Clinton’s. For information on third party candidates, as well as additional information about Hillary Clinton’s and Donald Trump’s positions, see Complex Child’s website. [source]