He doesn't want to see a European army.
"Ted Mallach, who is set to become to Donald Trump's ambassador to the EU, said the President-Elect is extremely concerned about Brussels beaurocrats [sic] forming a European army.
Mr Mallach told BBC's Pienaar Politics that Mr Trump would warn against Jean-Claude Juncker's plan for the common European defence.
It is believed that an EU army would ratchet up tensions with Russia's Vladimir Putin and accelerate Brussels-led expansion."
http://www.express.co.uk/news/world/754431/Donald-Trump-EU-army-Juncker-Mallach
I agree that European countries MUST contribute more to NATO