"The last time I spoke in the House of Commons, I said that the defence of the UK began in Ukraine," Mr Lopresti - who says he prefers being called Jack (short for Giacomo) - told Sunday Morning With Trevor Phillips.
"If Ukraine falls… we know what happens next", former Tory MP Jack Lopresti tells Trevor Phillips from Kyiv.
Volodymyr Zelenskyy has told Mr Trump "let's do a deal" - offering the US a partnership over Ukraine's stores of rare earth minerals.
"And about a year ago, I thought to myself, well, you know, politics looks difficult for us as a party at the moment, to say the least, and if I were not re-elected, then I'd come out here and do whatever I could to help.
Overnight, Mr Trump said he had spoken to Vladimir Putin on the phone - although the Russian side has not yet confirmed the conversation took place.