This summer, the leftwing Farabundo Martí National Liberation Front (FMLN), a long-time supporter of a bill to this effect, reintroduced it in the legislative assembly just months after winning a narrow victory in the 2014 national elections.
The conservative ARENA party should win in El Salvador in March, though it is likely to require a run-off to beat the ruling left-wing FMLN.
Both Mr Campos and Mr Samayoa say there seems to be little doubt that the TSE has an institutional bias towards the FMLN.
They confirm that Salvador Sánchez Ceren of the ruling left-wing Farabundo Martí National Liberation Front (FMLN) won the narrowest of victories over Norman Quijano of the right-wing National Republican Alliance Arenaa), with 50.11% to 49.89%.
In local and parliamentary elections on March 16th, Arena brought back its blood-curdling anthem, but to no avail: the capital, San Salvador, fell to the FMLN alliance.
They mostly flocked to Arena.Salvador Samayoa of Fusades, a think-tank, says the supporters of other first-round candidates, especially those of Tony Saca, who came third, switched to Arena, when initially it looked like they might back the FMLN.
Part of that was due to clever tactics by Arena, part bad luck for the FMLN.
In the run-up, the ruling left-wing Farabundo Martí National Liberation Front (FMLN), which quietly brokered the ceasefire in 2012 together with the Catholic church, all but disowned it.
US lawmakers had warned that an FMLN victory would jeopardise US national security interests in the region.During campaigning, Mr Funes capitalised on discontent with Arena's performance in government, which brought economic growth but did little to redress social inequalities.
To its credit, the Reagan administration tried to avoid the looming confrontation by offering the Sandinistas a deal whereby they would have a free hand with respect to their internal policies in return for discontinuing their support of the FMLN.
Only after nominating Mr Funes did the FMLN win the presidency.
