It is farcical to claim that US withdrawal from global leadership began with Trump. 

Freeland claimed in her speech this was "fact"

what rubbish

Where was she when Bush Jr undermined international law and invaded Iraq based on  a lie.  The great unravelling began  long before Trump came to power.

 When Obama  used R2P as a pretext for toppling Qaddafi,  deployed 500 drones  to kill civilians and terrorists alike extra judicially, failed to close Gitmo, had a de facto war with Pakistan, bombed Sryia and Iraq

The truth is the US is the architect of its own demise. Trump is merely an artifact.