Some are calling it a brilliant move.
Some are saying it foreshadows more ugly developments to come in the Senate expense scandal.
Pierre Poilievre, minister of state for democratic reform, believes it's a "smokescreen" and meaningless public relations manoeuver.
"If the Senate serves a purpose at all, it is to act as a check on the extraordinary power of the prime minister and his office, especially in a majority government," Trudeau said at a press conference.
Many took to Twitter on Wednesday to weigh in on the Liberal leader's surprising announcement that Grit senators will sit as independents in order to reduce partisanship in the upper chamber.
While some wondered if Trudeau was trying to get out in front of an impending auditor general report that could possibly shine an unflattering light on the expenses of some Liberal senators, it seems many others are excited by the proposal.
Liberal MP John McCallum went as far as to compare it to former prime minister Jean Chretien's decision to say no to the war in Iraq.
Check out some of the reactions below and tell us in the comments what you think of Trudeau's announcement.