Historically, pets — everything from birds to cats to dogs — have been part of the White House. And Biden's dog Commander isn't alone. More than a few have ended up embroiled in some controversy.

There have been five presidents who won the electoral vote but not the popular vote, including George W. Bush and Donald Trump.

Presidents' reactions have consistently combined outrage with promises of revenge. The language is remarkably similar. But there has been far less consistency in the delivery of actual retaliation.