Is it easy or hard to immigrate to Canada?

I've been seeing a lot of conflicting info so I wanted to find out the truth.

In my circles there are a lot of Americans unhappy with Trump who want to move to Canada, but it appears that it's actually quite difficult to do so immigration wise. These are well-educated, white collar professionals.

But on the other hand we've had a massive influx of international students in the past couple years, and honestly we have a reputation for admitting people left and right.

So which is it? Is it easy or hard for Americans to immigrate to Canada?