Sebastian Gorka and Victoria Derbyshire clashed on BBC Newsnight.A Donald Trump official has compared Victoria Derbyshire to a “kindergartner” for asking questions about the new US tariffs in an extraordinary clash.The US president unveiled a “reciprocal” 10% tariff on British imports last night – on top of a 25% surcharge on all car and steel imports.This new rate has been pitched as the “baseline”, and some other trading partners were hit with much higher tariffs.The EU now has a 20% tax on its imports to the US while China has a staggering 54% tax.The US president’s deputy assistant Sebastian Gorka told BBC Newsnight presenter Derbyshire that Britain should therefore be grateful.As she asked probing questions about