Another day, another idiotic outburst by Donald Trump, then another lame excuse that he was just kidding. But the Donald has raised an important question: Which American President is to blame for ISIS?

It’s George W. Bush.

True, Trump is so bad that W, his low-energy brother and his noble yet hapless father look good to us now. But let’s not get carried away.

It was George W’s decision, egged on by Darth Chaney and the Evil Neocons, to wreck Iraq after 9/11 even though Iraq had nothing to do with 9/11. The result: thousands of young Americans killed and maimed, trillions of dollars wasted and the moral stature and respect that America commanded in the world on 9/12 squandered.

Not to mention leaving a vacuum that fostered ISIS, the chaos and killing in the Middle East today and a tsunami of immigrants in Europe.

It could get worse. A President Trump would be the most valuable recruiting tool ISIS could have. There would be a surge of new terrorists around the world and right here at home.

While we’re on the subject of Bush 43, let’s also remember he took office when the economy was booming, unemployment was low and the federal budget was running a surplus. He left us with the worst economy in 80 years, the highest unemployment in decades and the worst budget deficits in history.

If a decent, well-meaning fellow like Bush could do that much damage, think what Trump could do.