While Calling Assad a "Gas Killing Animal", Was Trump Also Referring, Obliquely, to Putin the Poisoner?

Instapundit's Stephen Green links to Mark Hodge and James Beal's Sun story, which starts out thus:

DONALD Trump has told Russia to "get ready" for American "smart" missiles heading to Syria while blasting Putin for partnering with "Gas Killing Animal" Bashar Assad.

I can't help associating Gas with Poison � two largely invisible killers � and wondering whether, in the same breath, the "Republican firebrand" isn't referring to, and condemning, Putin's poisoning of a Russian spy and his daughter in the UK.