No, it wasn't Bush's doing. That's a left wing smear since it's all they have to offer. What helps a whole bunch is the popular media outlets polishing left wing shit and selling it as candy and blaming literally everything wrong on the right. People are tired of it and that's why Trump is leading.
Two things are wrong with this post:
It is all Bush's doing. He's the "Decider" who made the final decision to go into Iraq. He's claimed it, he owns it, it's only fools like you who want to blame others.
Popular media outlets don't have to "polish left wing shit" because the stench from the Republican wars, the Republican housing crisis, the Republican debt crisis, the Republican stock market collapse, and hemmoraging of millions of jobs to the Third World, drove them right into the Democrats' arms.
The Democrats, with a lot of obstruction from the Republicans, managed to stop the freefall loss of jobs, end both wars, help both the stock market and the housing market recover, reduce unemployment, and substantially reduce the deficit, while shrinking government, and reforming Health Care in America.
It's going to be difficult, if not impossible to sell those who vote Democrat on the idea that Obama has been a bad President, and talking endlessly about the deficits is not going to do it, nor is talking about stagnant wages, because Democrats know that the reason that wages haven't gone up, and nothing's been done about immigration reform, and nothing has been done about crumbling infrastructure, is because Republicans controlling both Houses of Congress have done nothing.
Regardless of who the Republicans have on offer this election, there is no one who could have defeated the Democrats. Until Republicans stop lying about their programs, and stop trying to peddle supply side economics (aka "voodoo economics" and "trickle down economics") as the answer to America's stagnant wages, you've got nothing.
Even Ronald Reagan acknowledged that his supply side economic theories were a bust in real life, and signed into law the biggest tax hike in US history. And yet Republicans are still promoting these failed right-wing taxation theories, which have already lead to the three biggest stock market crashes in World history, as the Holy Grail of economic reform.
The only people who will vote for Donald Trump, without a sound and viable economic policy, that doesn't involve tearing up trade treaties, or building walls, or slapping tariffs on imports, an immigration policy that doesn't violate the Constitution, and a sound foreign policy which doesn't involve violations of the Geneva Convention, or carpet bombing civilians, are the ones who have obtained the nomination for him, which is about 12% of the eligible voters, and those who are desperate to stop a Hillary Clinton Presidency. There are many more people who are desperate to stop a Trump Presidency, and the ramifications of such a Presidency, both at home and internationally.