This guy spells out a bunch of them. Some I don't agree with but most of them are legit disasters and there are others that aren't even on the list such as the Flint water supply.
http://www.martinoauthor.com/list-obama-failures/IRS targets Obama’s enemies, Benghazi, Spying on the AP, ATF “Fast and Furious” scheme, VA, New Black Panthers Voter Intimidation, The hacking of Sharyl Attkisson’s computer, Obama’s LIES about the Affordable Care Act, “I’ll Pass My Own Laws” - phone and pen, NSA Spying on American People, Disaster with the Arab Spring, Crimea, Leaving Iraq too soon and letting ISIS take over, Syrian Red Line, ISIS “JV”, Iran Nuclear Deal (this is a BIG one!), Traded 5 Taliban Prisoners For Deserter Bergdahl, Waging war by attacking Libya without Congressional approval, Paying ransom to Iranian for hostages and lying about it, spreading the border wide open, trillions more in debt with no infrastructure improvements to show for it, Racial Division at all-time high, Disrespect for Cops, Constant disregard for the Constitution with more unanimous Supreme Court decisions against him than any President in history (to my knowledge), Price of healthcare has drastically risen for those purchasing it, Highest percentage of Americans on Food Stamps and Medicaid, Record 92,898,000 Americans over 16 years not working, Lowest Labor Force participation rate of 62.7%, Refusing to Listen to CIA/FBI that there is no way to properly vet certain immigrants from Muslim nations, Colorado EPA Disaster, Worst economic recovery since the depression with anemic GDP numbers, and let's not forget his lies about giving them American people five days to see his proposals and offer feedback before they are put into action and showing the debate about healthcare on TV instead of having it behind closed doors and making us wait until after the bill is passed to find out what's in it.
It just goes on and on and on with this guy.
I'm also adding the Fukushima nuclear disaster. There was a window of a few days when Obama should have mobilized every military resource, in fact every resource, at his disposal to help Japan keep water on those reactors. That was key. It wouldn't have been easy but he didn't even try. And yes Japan didn't ask but that was a time when he should have insisted. That was a time when the world needed leadership and he showed none. Instead he didn't do anything to stop the irradiation of basically the entire Pacific Ocean not to mention all of our forces stationed in Japan. I mean that is literally a disaster.
If you say there was nothing he could do, I mean we could go into all the logistics of it and talk about the resources of our military and what it would take to keep water on those reactors and I find it impossible to believe that we couldn't have done it. We go in by sea, establish a beach head, and get pumps and hoses going from the ocean up to the reactor. One destroyer has enough juice to power a small town. Get the whole fleet up there. Do helicopter drops of water on the reactors if need be. Get forest fire fighting equipment from the U.S. over there to help. Put our military including the Army Corps of Engineers to work clearing the roads. Treat it like it is life and death and preventing a nuclear meltdown is on the line, which it was. Instead, Obama had his Rudy Giuliani moment of opportunity to demonstrate real leadership and he just didn't step up. If there was nothing he could do then he wasn't the right man for the job. We needed someone who could do something. But we didn't have that person. All we had was Obama.
A far as I know, we still don't have a world plan in place to deal with such a nuclear disaster if it happens again. That's just ridiculous. Obviously, relying on the country that was just struck by a tsunami is absurd, as it would be if they got hit by a terrorist attack or even in the case of Russia just have an accident. Work should be done to establish such a quick reaction force and have all nuclear powers join together to contribute personnel, material, expertise, and get a plan in place because it's only a matter of time before it happens again.