In 2009 there was the Keynesian moment. With the economy shedding hundreds of thousands of jobs a month, with the financial system imploding and GDP crashing, the US government stepped in with a stimulus bill designed to get spending started, to boost the states, and to invest for the long-term. At a spending level nowhere near the challenged, President Obama still managed to oversell what it would deliver. By 2010, with unemployment still high, Democrats would silently walk away from the entire endeavour.
This lead to the counter-Keynesian assault of 2011-2012, politically lead by the Tea Party in Congress.