If Trudeau 2.0 has the same arrogance and stubbornness that Trudeau 1.0 had, Trump may take sufficient umbrage that he and his presidency will be even less beneficial for Canada than the Obama presidency was.  Treated professionally and respectfully, Trump may very well be a far more useful president for Canada than was Obama.  Their vaunted bromance notwithstanding, all Justin ever got from Barack was a free meal at the White House and an address to our parliament in which he diplomatically asked us to stop being defence welfare bums and do our fair share in NATO.