Last month, 303 people were murdered in the Mexican border city of Ciudad Juarez, which lies alongside El Paso. This month, the dead include three men killed by a sophisticated, remote-controlled car bomb – the first in Mexico’s drug wars. In a city of 1.2 million, more than 2,600 died violently in 2009; some 200,000 more may have fled.

Meanwhile in Washington, the Government Accountability Office has drawn up a list of assistance promised to Mexico by the United States since 2008, but not delivered. It includes: at least nine Black Hawk helicopters; three Bell helicopters; four airplanes for sea patrolling; intelligence, surveillance and reconnaissance aircraft; 218 polygraph units; two railroad inspection units; mobile gamma radiation trucks; and five training programs, ranging from “financial intelligence” to “drug demand reduction.”

Since the end of the Cold War, neglect of Latin America has become something of a fine art in Washington, practiced by Republican and Democratic administrations alike. But even in that context, the disregard for Mexico over the past couple of years is kind of astonishing.

The government of Felipe Calderon – a pro-American moderate who just barely defeated a leftist populist in the 2006 presidential election – is locked in a battle with drug cartels that will determine whether the country remains a modernizing democracy or plunges toward failed-state status. For violence and for sheer terror, the war resembles that of Iraq or Afghanistan. More than 50,000 Mexican troops have been deployed to fight the cartels; some 25,000 people have been killed in less than four years. Beheadings have become common, along with massacres, assassinations, gun battles on the street – and now, car bombs.

The United States has not entirely ignored this crisis. But its efforts to help Calderon’s government have been late, paltry and mired in bureaucracy. The Obama administration proposed $10.7 billion for civilian stabilization programs in Afghanistan and Pakistan in its 2011 budget; it requested $300 million in aid to Mexico. Congress has appropriated $3.6 billion for fencing along the U.S.-Mexican border, to keep out illegal immigrants. For the Merida Initiative, the program developed to assist Mexico’s counternarcotics campaign, it has approved $1.3 billion since 2008.

As of March, $121 million of that appropriation – or about 9 percent – had actually been spent. Much of the rest, according to the GAO, was bogged down in more than a dozen federal agencies. The Mexican government was so frustrated by the delays that it advanced its own money for a anti-money-laundering operation, the report said. The State Department responded by reprogramming the money it had promised but never delivered.

This record of malfeasance is bad enough. But in Mexico’s war, the United States also plays the role of supplier to the enemy – and it does that far more efficiently. At a discussion sponsored by the think tank Third Way in Washington, Mexican Ambassador Arturo Sarukhan pointed out that the vast majority of guns and money flowing to the cartels come from the United States, including from 7,000 federally licensed gun stores along the border in Texas and Arizona. Eighty percent of the 75,000 guns seized by the Calderon government over three years came from the United States.

“Mexican citizens on my side of the border ... believe that we’re paying a heavy toll for what is basically a U.S. responsibility,” Sarukhan said. So will they vote for a presidential candidate who would continue to pay that cost when Calderon’s term ends in 2012? The ambassador said he thought so. But he might have added: that may depend on whether the Obama administration and Congress do more to help turn the tide in cities like Ciudad Juarez.