Berlin declined to say on Wednesday if it supports a proposal for the European Union to issue defence bonds, after Poland's foreign minister said that countries including Germany present at a meeting in Warsaw on Tuesday backed the idea.

The decision is a major change in U.S. policy and comes as Donald Trump, who has promised to limit further support for Ukraine, prepares to take office.

Musk has been a near-constant presence at Mar-a-Lago, where he has sat in on important meetings and calls.