Liberal Leader Justin Trudeau is the latest federal leader to throw his support behind relaxing rules that restrict the amount of alcohol Canadians can bring across provincial borders.

Trudeau was responding to questions about a New Brunswick court case where a man was arrested for violating the New Brunswick Liquor Control Act.

Gerard Comeau was bringing 14 cases of beer and three bottles of alcohol into Campbellton, but the law only allows a person to carry 18 bottles or cans of beer and one bottle of wine or liquor across the border.

Conservative Leader Stephen Harper called the restrictions "ridiculous" at a campaign stop on Monday.

The Liberal leader said he supports loosening the cross-border alcohol rules and he said Harper must accept some of the blame for these restrictions still being in place.

"This is something that of course we support," he said.

"The prime minister has in fact committed and promised time and time again to reduce inter-provincial trade barriers of this type. He has been unable to. And that's a direct consequence of his unwillingness to actually sit down and meet with and work with the provinces on issues such as this."

The federal government has brought in legislation to make it easier to move alcohol between provinces.

However, similar legislation is required at a provincial level.

Trudeau said Harper has refused to work with premiers on these types of problems, which is why these trade irritants still exist.

He said he would improve the working relationship between the federal and provincial governments.

"That's something that we're committed to and that's why we need a government that actually co-operates and collaborates with provincial premiers," he said.

A decision in the New Brunswick man's case is not expected until the spring.