Currently three cartels control most of the border region between the U.S. and Mexico. But the federation, or Sinaloa cartel, is fighting for a larger area of the border and may be negotiating a truce with the Gulf cartel.
Fred Burton, vice president for counterterrorism and corporate security at Stratfor Global Security says it's not surprising these groups are trying to join forces.
"We've seen reports coming out of Mexico that cartels have set down and tried to do business together because of, let's face it, pressure. Whether that be law enforcement pressure or military pressure, (it) is bad for business."
The Sinaloa traditionally has used southern Arizona as its avenue to smuggle drugs into the United States. But these once-open borders have been shut down by U.S. Border Patrol agents, who have increased patrols and put up fences. Agents say it only makes sense that the Sinaloa cartel would fight for new territory and at the same time look for a new partner.
If the Sinaloa struck an alliance with the East Coast-based Gulf cartel it would gain another smuggling route into the United States and an important ally in the war against the Mexican military.
In the last two years, Mexico has deployed 50,000 Mexican troops and federal police officers along the northernmost regions in order to confront the drug cartels, after President Felipe Calderon pledged to tackle the growing problem. His strategy has been met with varying success.
President Obama said Wednesday that he was looking at possibly deploying National Guard troops to contain the violence, and the administration has been watching cartel movement closely.
"If they have to adapt their tactics, whether that means negotiating with another cartel, or whether it means giving up certain trafficking routes — which we have also seen — all of those are a reflection of effective strategy to pressure these cartels," said Deputy Assistant Secretary of State Roberta Jackson.

