FORMER BRITISH PRIME MINISTER BORIS JOHNSON. >> HELLO. >> PRIME MINISTER, LINSEY, HOW ARE YOU? >> VERY HONORED TO BE INVITED ON YOUR SHOW. >> OF COURSE. THANK YOU SO MUCH FOR JOINING US. >> THANK YOU SO MUCH FOR YOUR TIME. >> Reporter: FORMER BRITISH PRIME MINISTER BORIS JOHNSON ON U.S. SOIL, HERE TO URGE REPUBLICAN LAWMAKERS AND THE U.S. AS A WHOLE TO STAY THE COURSE WITH AID TO UKRAINE. >> JUST BACK FROM UKRAINE. WHAT BROUGHT YOU HERE TO D.C.? >> I'M HERE REALLY TO MAKE IT CLEAR TO AMERICAN LAWMAKERS, TO THE PEOPLE OF AMERICA AS FAR AS I'M ABLE, HOW DEEPLY GRATEFUL I THINK WE IN THE UK, EVERYBODY IN EUROPE, IS TO THE UNITED STATES FOR WHAT YOU'VE DONE. I MEAN, LOOK AT IT. THIS IS A WAR THAT COULD SO EASILY HAVE GONE THE OTHER WAY. PUTIN COULD HAVE CRUSHED THIS COUNTRY. AND WHAT HAPPENED? THE UNITED STATES STEPPED IN, GAVE THE ASSISTANCE, GAVE THE TRAINING, GAVE THE INTELLIGENCE TO HELP THE UKRAINIANS TO DEFEND THEMSELVES. THAT WAS MAGNIFICENT THING TO DO. ABSOLUTELY MAGNIFICENT. THE ONLY THING I WANT TO SAY IS THE UNITED STATES I HOPE WILL STICK WITH IT. >> A SNIPPET OF THE BBC DOCUMENTARY RECENTLY RELEASED, YOU SAY PUTIN SAID TO YOU ON THE PHONE, "BORIS, I DON'T WANT TO HURT YOU, BUT WITH A MISSILE IT WOULD ONLY TAKE A MINUTE." HOW DID YOU RESPOND? >> HE WAS TRYING TO CREEP ME OUT IN A PLAYFUL WAY. HE WAS TALKING ABOUT THE DANGERS OF A MISSILE EXCHANGE. I FEEL THE CRUCIAL THING WITH ALL THIS IS NOT TO GET SUCKED INTO THAT ARGUMENT. >> DO YOU THINK HE'S UNHINGED? WHAT'S HIS MINDSET? >> DO YOU KNOW, I THINK THE LESS WE TALK ABOUT HIM, THE BETTER. >> HOW MUCH MORE DO WE NEED TO DO? IT SOUNDS LIKE AMERICANS HAVE ALREADY SPENT ABOUT $50 BILLION IN AID, ALREADY PLEDGED ANOTHER $50 BILLION FOR THIS YEAR. WE'RE TALKING ABOUT $100 BILLION. UNDER THE POLITICAL LANDSCAPE, I CAN UNDERSTAND YOUR PERSPECTIVE. BUT FOR THE AVERAGE AMERICAN SAYING, LOOK, I'M STRUGGLING WITH INFLATION -- >> I KNOW, WHERE'S THAT INFLATION COME FROM? WHAT CAUSED IT? THAT'S BEEN DRIVEN BY ECONOMIC INSTABILITY, BY OIL PRICE SPIKES CAUSED DIRECTLY BY PUTIN'S AGGRESSION. PUSH PUTIN BACK AND YOU FIX A LO