And a significant number rate him as the worst president ever. Check out these specific indictments by those who have studied the past most closely.
He has taken the country into an unwinnable war and alienated friend and foe alike in the process;
He is bankrupting the country with a combination of aggressive military spending and reduced taxation of the rich;
He has deliberately and dangerously attacked separation of church and state;
He has repeatedly "misled," to use a kind word, the American people on affairs domestic and foreign;
He has proved to be incompetent in affairs domestic (New Orleans) and foreign ( Iraq and the battle against al-Qaida);
He has sacrificed American employment (including the toleration of pension and benefit elimination) to increase overall productivity;
He is ignorantly hostile to science and technological progress;
He has tolerated or ignored one of the republic's oldest problems, corporate cheating in supplying the military in wartime.
James Buchanan, of course, is Bush's closest competition. Buchanan let the country slide into Civil War while trying to appease the slaveholding white South. So maybe it's a tie, or maybe Bush is simply the "next to lowest ranking president". But it's still pretty bad to be down there in the nether regions below Grant and Harding.
This is what comes from putting into office (through a coup d'etat in 2000) the most spectacularly unqualified and utterly dishonest major party candidate for president in our history. This is what the "patriotic" Republican Party has done. It's put us on the road to utter and absolute ruin. I guess that's how they show their "love" for America.