Thousands of people are expected to march on Argentina's Congress this evening at 7pm to call on the country's senators to strip Senator Cristina Fernández de Kirchner of her parliamentary immunity.
Organisers called for the so-called "21A" protest — in reference to the date it is being held — after the Upper House failed to reach quorum on Wednesday for a vote on the issue of Fernández de Kirchner's privileges.
The former president-cum-senator is tied up in an alleged kickback scheme from her days as president. The so-called "notebook" case involves former high-ranking officials in hers and her late husband Néstor Kirchner's governments, in cahoots with construction sector bosses.
Over a dozen men have secured plea bargains in the case, with all their fingers pointed at CFK as one of the key organisers of the scheme alongside her husband and their former Planning Minister Julio de Vido.
Fernández de Kirchner has vehemently denied the allegations, describing them as a conspiracy against her over the self-perceived success of her policies as head of state.
Senators are protected from prosecution and police raids, the two issues that the ruling Cambiemos coalition and allies hoped to address last Wednesday.
The Senate will tomorrow vote on the same measure.
The Mauricio Macri government has distanced itself from today's march, insisting the event's organisation was completely organic.