The President of the Liberal Democrats, Tim Farron, has attacked Home Secretary Theresa May after Norman Baker resigned as the department's Minister of State for Crime Prevention.
Farron told the BBC Radio 4's Today Programme that May runs the Home Office as if the Conservative Party had won a majority at the 2010 General Election and that this alleged behaviour is an "insult to the electorate".
"I'm not the one here to lay in to May but there is a sense in the Home Office, and across all sides of government, that May behaves as though the Conservatives won the last election, and they didn't... it's an insult to the electorate to act as though they did," Farron said.
But the Liberal Democrat MP also insisted that the Coalition Government was "working well".
Farron made the comments after his colleague Norman Baker announced that he had resigned as the Home Office Minister.
He told The Independent that the experience of working at the Home Office had been like "walking through mud" as his plans were allegedly opposed by the Home Secretary and her advisors.
"They have looked upon it as a Conservative department in a Conservative government, whereas in my view it's a Coalition department in a Coalition government," he said.
"That mindset has framed things, which means I have had to work very much harder to get things done even where they are what the Home Secretary agrees with and where it has been helpful for the Government and the department.
"There comes a point when you don't want to carry on walking through mud and you want to release yourself from that."
The move comes with months to go before the 2015 General Election next may.
The latest poll from Lord Ashcroft put the Liberal Democrats three points up on the last research conducted by the peer at 10%.
However, Nick Clegg's party is currently well behind its 2010 General Election vote share result of 22.1%.