President Donald Trump on Friday denied his trade wars were harming the US economy, instead of blaming the Federal Reserve for allowing a strong dollar that makes American exports less competitive.

"We don't have a Tariff problem.... we have a Fed problem," Trump said on Twitter.

He said as the euro falls against the dollar, it is "giving them a big export and manufacturing advantage," while his aggressive tariffs are taking care of "bad and/or unfair players."