Liberal Senate to cause Constitutional Crisis?

This one seems to have been missed by most... is the Liberal Senate willing to cause a Constitutional crisis over Bill C-288? Both Bill C-288 and a Budget implementation bill are set to be voted on in the Senate this week... and pay close attention to what the Liberal Senate Leader Celine Hervieux-Payette said...

"Two important bills are now before the upper chamber for final sanction: the budget implementation bill and the opposition-backed C-288, a motion that seeks to entrench Canada’s support of the Kyoto Protocol on climate-change and its targets of cutting greenhouse-gas emissions by six per cent over 1990 levels.

Getting that budget bill passed is a priority for the minority Conservative government — a fact that Liberal Senate Leader Celine Hervieux-Payette planned to use to her advantage as a sort of you-scratch-my-back-I’ll-scratch-yours scenario.

She said she’s bound and determined to get that Kyoto bill passed, and will not stand for any obstructionism.

"We’ll see how kind they are. They have to put some water in their wine and I think we’ve got a pretty serious bargaining chip," said Hervieux-Payette. "I’m not giving anything if they don’t give anything."

The Kyoto bill will cause damage to the economy, said Government Senate Leader Marjory LeBreton, and tying it to the budget bill is "foolhardy."

"If the unelected and unaccountable Liberal majority in the Senate takes the unprecedented step of blocking a government budget bill — which contains many essential measures that in are in the interests of Canadians, such as eco-energy money for the provinces — they will have proven beyond a doubt that Liberal political entitlement has not abated and they have learned nothing," LeBreton said.

What do you think? Can the Liberal Senate hold up the Government's Budget without causing a Constitutional crisis? Is that not a case of the Liberal Senate voting no-confidence in the Government? Are they able to do that? Will the GG have to step in?