I truly hope that there are those bright enough left
I don't think that the US really cares what Brazil thinks right about now. As for Colombia, Trump is already making it pretty plain what his thought are.
Venezuelans have become dirt poor over the last 25+ yrs of their 'Socialist' experiment. They went from being one of the wealthiest countries in LA to rivalling Cuba/Haiti as the poorest. The chance of their regaining even a 1/3 of their former wealth would be a massive move in the daily life experiences for 90% of the population.
I hope that there are enough bright people left in our Foreign Affairs department who have the right ears of Sr CDN Gov't officials and politicians to press upon them the seriousness of the situation to Canada if the US moves into VZ and does regime change. Their heavy oil is much easier to extract, will have 100% less environmental restrictions, is almost at tide water already and would be cheaper to produce and ship to the US Gulf Coast refineries than Alberta oil sands.
I view this situation as a serious threat to our well-being.