Farage also said retaliatory tariffs would be "absolutely counter productive in every way" for the UK following US President Donald Trump's imposition of the taxes.
He said he believed the global tariff policy was part of a wider negotiation strategy by the US president.
He said: "It'll look different in three months' time. He'll use it as a big negotiating tool. I think we're better positioned to come out of this with a deal than almost any other country.
"So, short term it's painful, but what it does do, it expose the fact that not being in the European Union does have advantages and ones that we ought to use."
According to the Local Democracy Reporting Service, businessman Mr Ryan appeared to have already endorsed a Labour candidate in the Bessacarr ward of Doncaster.
Election literature for Lee Mulholland included a quote from Mr Ryan which said: "I see the great work Lee has done for the area where I grew up – keep it up!"
Reform has fielded three candidates in the ward.
A spokesperson for the party said: "Mr Mulholland is an employee of John Ryan, and these comments were made in relation to his work."
A Labour spokesperson said Mr Ryan had agreed over the phone to endorse Mr Lee's candidacy, but not the party more broadly.
Full list of candidates standing to be Mayor of Doncaster:
Frank Calladine – British Democratic Party
Nick Fletcher – Conservative Party
Alexander Jones – Reform UK
Ros Jones – Labour Party
Andrew Walmsley – Yorkshire Party
David Bettney – Social Democratic Party
Julie Buckley – Green Party
Andy Hiles – Trade Union and Socialist Coalition
Ahsan Jamil – Workers Party of Britain
Mihai Melenciuc – Liberal Democrats
Richie Vallance – Independent
Doug Wright – Independent
