At a Nato press conference in the Netherlands, President Trump took a question from Myroslava Petsa from the BBC Ukrainian Service.
She asked whether the US would be supplying Patriot air defence systems to Ukraine.
Trump then asked where she was from and took an interest in her personal situation, asking whether her husband was a soldier in Ukraine, to which she said yes.
"I wish you a lot of luck, I can see this is very upsetting to you and say hello to your husband," he concluded.