True, but presidents set the agenda. Clinton had a booming economy in spite of an anti growth agenda. He presided over a bubble.
Bush set the agenda to pull the economy out of recession by proposing investment and wage tax cuts that had some meat to them. Not just some rebate tossed into the pile.
In the case of Bush's tax cuts, the economic trend can be traced directly to them. Look at GDP growth beginning with 2003 up to date and look at GDP growth prior to 2003.
But the fact remains that the business cycle itself has far more to do with the current state of the economy than anything any president does or does not do.