Erika Hilton and Duda Salabert threatened during campaigns
Neither candidate received 50 percent of vote on Sunday
Alba Rueda is a transgender woman, long-time activist
Document would have enshrined LGBTQ rights in country
Alejandra Ironici found dead in home on Sunday
Gustavo Petro has pledged to support LGBTQ, intersex rights
Activists have sought Article 365 repeal for more than two decades
Draft document specifically includes LGBTQ rights
Demonstration in Chilean capital drew more than 100,000 people
First round of Brazilian presidential election to take place Oct. 2