Why does Trump get Credit for Economy?

I'm sure if you've heard Donald Trump speak for more than 5 minutes you've heard him talk about the rising stock market coupled with vast economic growth. And not unlike the comments of other politicians, he attributes the entirety of the economy's success to himself. I really have never understood how this makes any sense to voters. Sure, I understand if a politician wants to take credit for "standing strong on immigration" when in fact he or she merely pushed along a partisan formality. I guess that's just politics, and I understand that's how the game is played.

But, it just seems so blatantly obvious that Trump hasn't achieved any policy that would even give the appearance of economic growth. Now that's not to say that he won't attempt to create policy that impacts the economy in the future, but from the people that you hear on the news, it seems like he's the one responsible for driving the Dow higher.

Let me start by saying that every President lives and dies with the economy, this isn't just a Trump issue. Bill Clinton is said to have had one of the easiest presidencies of all time because of natural economic growth, but he would have put an end to the bull market if he got his way. It was those closest to him that told him to pull his foot off the gas that was runaway expansionary fiscal policy. So, I get that the President's success becomes analogous to the success of the economy, but should this be true in our modern political landscape?

Now this post might seem out of touch as it is written shortly after the President just shocked the stock market lower because of his comments about NK, but I see this as a short term effect that should have not be used to justify his economic control. Like many things Trump related, I hope (really really hope) that this blows over.

But getting back to my point, why do people think the Presidency is so connected with the economy? If you wanted to make the argument that the executive branch has the power to make fiscal policy, I would agree with that, but not in this administration so far. Our current President doesn't have the ability to create economic prosperity by virtue of his presence in the Oval Office. Creating lasting policy takes time and cooperation, something that our government seems incapable of at this point. Yet at every rally Trump holds, we talk about the ability the President has to drum up growth.

I'm tired of the charade, but I know it won't change. Voters and the media alike will continue to attributive the natural actions of the economy to the politicians lucky enough to be in power at that moment.

But let me hear it if you don't agree with me, I'd love to hear some other opinions on this one. Personally, I just don't see why people believe our President has anything to do with our current economic success.