It's also instructive to look at American attitudes toward the Iraq war. I'm pretty sure that many people who now say it was a terrible idea and that they voted

It's also instructive to look at American attitudes toward the Iraq war. I'm pretty sure that many people who now say it was a terrible idea and that they voted for Trump because they don't want to be in any more wars were absolutely rock-ribbed supporters of it at the time. Asking if they think Obama did a good job in extricating the US from that conflict serves as a useful litmus test.