Karl McCartney, who had been MP for Lincoln for seven years, levelled the accusation at The Lincolnite after it published a story about his expenses claims in the run-up to the 8 June vote.
Mr McCartney, left, who lost his seat to Labour’s Karen Lee by a margin of 1,538 votes, made the claims during an interview with BBC Radio Lincolnshire.
The Lincolnite, which also carried a paid-for advertisement for Labour on election day, says it completely rejects the accusations which it called “unfounded.”
During the interview, Mr McCartney said: “Any sane normal person would say [The Lincolnite and Labour] did a pretty good hatchet job.
“When I stood and was lucky enough to be elected and became the Member of Parliament for Lincoln – [it was] an honour and privilege to do the job. But I was proud of the fact the I didn’t have to go into the gutter to do that.”
Following the results count in Lincoln, The Lincolnite recorded Mr McCartney’s exit from the venue.
He had also refused to give any interviews to the site throughout the general election campaign.
Mr McCartney added: “Well it’s turned that way by again The Lincolnite who did that. But actually you don’t have to give an interview to the media. You make a decision whether you do or not.”
Lincolnite managing editor Daniel Ionescu went on air to deny Mr McCartney’s allegations.
He told Radio Lincolnshire: “The accusations that he makes are quite unfounded. We ran one single story which was a fact file on his voting record and his official expenses from the parliamentary website for expenses and that was the only story we were able to run about the MP in Lincoln who was in power for seven years.”
On the advertisement placed by Labour on his site, Daniel added: “We haven’t endorsed Karen Lee for Labour. We carried a paid promotion from Karen Lee, the Labour candidate, which is the same as a newspaper carrying a wraparound from the Conservative Party.”