Average annual real GDP growth by president
Reagan (1981-88), 3.5%
Obama (2009-15), 1.5%
Yes the Reagan presidency was such a failure.

Look at Kennedy growth rate
Kennedy (1961-63), 4.3%
Wow. How did he achieve this? He cut taxes.

https://www.hudson.org/research/12714-economic-growth-by-president?ref=patrick.net