This week, Iranian-backed Houthi rebels seized control of the Yemeni government, heretofore pro-American. In September, they overran Sanaa, the capital. On Tuesday, they seized the presidential palace. On Thursday, they forced the president to resign.

Passing a law like the assault weapons ban is a symbolic - purely symbolic - move in that direction. Its only real justification is not to reduce crime but to desensitize the public to the regulation of weapons in preparation for their ultimate confiscation.

There used to be a cruel joke that said Brazil is the country of the future, and always will be; Obama is the Brazil of today's politicians. He has obviously achieved nothing.

If Russia were to do something that it could do, it looks like it might even be preparing to do, to invade Ukraine and essentially to dismember it, this would be the one item that could reflect really badly on Trump because of the warm way he spoke about Putin.

Ideas matter. Legislative proposals matter. Slick campaigns and dazzling speeches can work for a while, but the magic always wears off.

Increasing public safety almost always means restricting liberties.

When a party is in opposition, it opposes. That's its job. But when it comes to power, it must govern. Easy rhetoric is over, the press of reality becomes irresistible. By necessity, it adopts some of the policies it had once denounced. And a new national consensus is born.