President Trump has turned Canada into a punching bag. In response, a Canadian boycott on U.S. goods is gaining ground.

One economist warns the Trump administration may "have to put its hand on the hot stove of high tariffs" to learn the damage – or good – they could do for the economy.

Measles cases are rising in the U.S. with infections confirmed in at least five states this year, and primarily spreading among unvaccinated people.