AP-NORC Poll: Trump benefiting from economic policies

I have always argued that a sitting President cannot change the economy that fast or even during their time in office. Anti-Trumps would agree this economy comes from Obama's changes, yet those same folks would argue against that the economy nose dive during Bush was Clinton's fault, and that Obama's success was Bush. Cannot have it both way, either Obama fixed Bush's mess and Trump has been this successful or Bush's crash was Clinton.

MAJ Byron Oyler - If you look at the economic policies implemented in 2009-2010 and consider the reversal of the economic downward trend from 2011 and so on; one can argue Obama's policies contributed to the turnaround. Bush early economic policies in first term benefited growth but the wars countered that growth. His later economic policies in second term contributed to the market crash in 07-08.
As for Trump, describe one economic policy in 2017 that influences anything other than the stock market? The Tax Bill was Dec 2017 so we have to wait to see how it influences economic growth in the form of jobs and wages.