The RCMP raid on the Conservative Party headquarters in Ottawa again dominated question period in the Commons on Wednesday, with the Liberals demanding answers.

The Mounties, along with Elections Canada officials, executed a search warrant Tuesday at the Tory party offices. They were apparently looking for documents related to alleged Conservative irregularities during the last federal election.

Liberal Leader Stephane Dion demanded to know, "Why did the RCMP need the search warrant. Why?"

As he did yesterday, Prime Minister Stephen Harper insisted the raid was related to a civil court action that the Tories have initiated against Elections Canada.

The government agency had refused to reimburse the Tories for $1.2 million in advertising spending during the last election. Elections Canada said the Tories had surpassed their national ad allowance and refused to accept the Tory claims that local ads were not national in scope. The Liberals have said a civil suit would not involve search warrants.

Tuesday's raid may be related to a plan referred to as an alleged "in-and-out" scheme. Under such a plan, money would allegedly be sent to candidates across the country -- up to $50,000 in cash -- which they would then pay back to the central office, claiming it was payment for advertising.

The Conservatives claim that they did nothing wrong, and they would win their suit against Elections Canada. But Dion said the Tories have lost previous cases against the government agency.

The controversy descended into regular House of Commons theatrics Wednesday when Deputy Liberal Leader Michael Ignatieff began a question with the suggestion that the RCMP had to enter the Tory offices wearing "bullet proof vests."

He was jeered by Conservatives forced to cut his question short. He then asked his question, this time without any reference to flak jackets.

"What does this (the raid) say about the prime minister's character -- his character," he asked.

On CTV's Mike Duffy Live late Wednesday afternoon, Liberal MP Garth Turner, who ran as a Conservative in the last election, said "This is a (Conservative) party that is not open and transparent any more."

Conservative MP Jason Kenney said the Tories have acted within the law and ran the last federal election campaign in the same manner as their opposition.

"Every single party does this in every single election. It's an established part of the election system," he told Mike Duffy Live.