Attack ads, political bottle tossing and recriminations have marked this year’s race to replace outgoing Gov. Susana Martinez, who is leaving office due to term limits. The campaign’s increasingly dark tone illustrates the state of play in politics here in New Mexico and across the nation. But under the tribalism lies something else: A set of stark differences in visions held by the two candidates, Democrat Michelle Lujan Grisham and Republican Steve Pearce, who have both abandoned seats in the U.S. House of Representatives for a shot at the Governor’s Mansion. During three televised debates, Pearce and Lujan Grisham have hurled broadsides and frontal attacks at one another on a host of issues bedeviling the state — from education to immigration, economic development to marijuana legalization, energy to water conservation. Clashes over how to address New Mexico’s persistently high crime rates, particularly in Albuquerque, have torched some of the race’s oxygen, too.