Divisive Leftists in Mexico

At least leftists in the U.S.A. haven't gone this far yet in their efforts to divide Americans and cripple the government:

Obrador 'inauguration' in Mexico

The defeated left-wing candidate in Mexico's presidential election, Andres Manuel Lopez Obrador, has held an unofficial swearing-in ceremony.

During his "inauguration" in Mexico City, Mr Lopez Obrador said he was launching a "parallel government".

He claims [he] was the victim of fraud in July's election - a view shared by millions of Mexicans.

But some of his supporters think his alternative inauguration is ill-advised and politically irresponsible.

What's the Spanish word for "divisive"?