Mitt Romney's campaign for the US presidency has rejected claims that several of its senior aides were unhappy with David Cameron's recent visit to Washington.
On Wednesday The Guardian reported that officials working for the Republican presidential candidate were dismayed at what they saw as the Conservative prime minister's overt praise for President Obama.
An aide is said to have told the paper that the "love in" was inappropriate. "You don't take sides in an election year," they said.
They also suggested that Cameron had been somewhat naive in his approach to the Democratic president. "It's curious. What Cameron did is ironic, seeing that a few days later Obama said he was neutral on the Falklands. Cameron was taken for a ride by Obama," they said.
However Andrea Saul, spokeswoman for the Romney campaign, later denied there was a problem.
"The statements and facts reported in The Guardian story concerning the campaign's plans and thinking are wholly inaccurate and demonstrate that whoever conveyed them has no familiarity with the campaign's policies or decision making," she said.
Mitt Romney is close to securing the Republication nomination for president
During his visit to the US in March, Cameron joined Obama at a photo-friendly basketball game in the swing-state of Ohio as well as enjoying a star-studded banquet.
In speeches in the garden of the White House both prime minister and president lavished praise on each other, including exchanging jokes about the US war of independence.
It is not the first time Cameron has risked the ire of US politicians as they do battle to secure the White House. In 2008, when he was still leader of the opposition, he endorsed the Republican candidate for president, Senator John McCain.