The war of words between Hillary Clinton and Ukip have continued after a former top aide to the US presidential candidate claimed Russia's Vladimir Putin funds the Eurosceptic party.
Neera Tanden, the president of thinktank Centre for American Progress, made the allegation after former Ukip leader Nigel Farage criticised Clinton at a Donald Trump rally in Jackson, Mississippi.
"If you're in Europe, the Russians are openly funding the far-right groups, from [Britain's] Ukip to Marine Le Pen ... There is widespread knowledge among the center-left parties that that is a rising development," Tanden told Politico magazine.
But Tanden, a former policy adviser to Clinton, failed to provide any evidence to support her claims.
Political parties in England, Scotland and Wales can only accept donations from individuals and companies based in the UK.
"These comments, which are demonstrably false, show the depth of ignorance in the Clinton camp of the US' oldest and firmest ally," a Ukip spokesman told IBTimes UK.
"It's a shame, but it shows a good education doesn't make you the most knowledgeable person in the world."
Clinton first attacked Farage after the Eurosceptic firebrand said he would not vote for the Democrat if he was paid, while failing to endorse Trump. Clinton hit back by attempting to link Farage, who has appeared on Kremlin backed RT TV, to Putin.
"The grand godfather of this global brand of extreme nationalism is Russian President Vladmir Putin," she said. "In fact, Farage regularly appears on Russian propaganda programmes."
UPDATE: 15:35 BST
IBTimes UK pressed Ukip over whether the party's spokespeople and MEPs are paid for appearing on RT TV. A spokesman said: "Never in my knowledge."