On Domestic Policy, President Richard Nixon stood to the Left of President Bill Clinton. What's the explanation?

As President, Nixon imposed wage and price controls, indexed Social Security for inflation, and created Supplemental Security Income (SSI). He created the Environmental Protection Agency (EPA) and Occupational Safety and Health Administration (OSHA), promoted the Legacy of parks program and implemented the Philadelphia Plan, the first significant federal affirmative action program.

Comparatively, Bill Clinton's policies seem conservative: the welfare reform bill, NAFTA, GATT, farm deregulation, telecommunications deregulation and financial services deregulation, all of these things moved policy in a market-oriented direction.