The "Outnumbered" panel pointed out the curious timing of Hillary Clinton's announcement of her opposition to the Keystone XL pipeline. 

Clinton had punted on the issue for months, but finally made her position known during a campaign stop in Iowa Tuesday. 

In 2010 when she was secretary of state, Clinton suggested that the State Department was "inclined" to approve the project, which would carry oil from Canada to the Gulf Coast. 

Mike Huckabee had another theory for why the former secretary of state is opposing the pipeline. 

Republicans have expressed support for the pipeline - which was rejected by the Senate last year - arguing that it would be a major boon to the economy. 

Bernie Sanders vehemently opposes the pipeline, saying last year that it's "insane" to accelerate production of "some of the dirtiest oil on the planet."

In response to Clinton's announcement, Sanders he was "glad that Secretary Clinton finally has made a decision and I welcome her opposition."

Democratic strategist Julie Roginsky said it's clear that the Clinton campaign wanted the news to be buried in the news cycle during Pope Francis' historic visit.

Andrea Tantaros agreed, but said there are other factors at play, including Sanders' rising poll numbers.

Watch their analysis above.