Stopping foreign interference in elections??

OK, G&M, how about stopping it by NOT giving them (a Canadian) a platform to write about it (working on a US election campaign)?

https://www.theglobeandmail.com/opinion/how-canada-can-avoid-a-trump-esque-fate/article33698420/

The author of this article almost certainly broke labour laws in the USA, as well as violated the NAFTA agreement.

You simply cannot cross the border to work/volunteer. The act of lying to a border agent on your reason to cross itself is a criminal offence. If she had given any indication she was going to either volunteer of work (especially on a political campaign) she would have most certainly been turned away, or in fact charged. The article give no indication she has any right to do any sort of work, paid, or unpaid in the USA.