Mr Guaidó also expressed his opposition to the proposal on Twitter. Referring to the opposition's boycott of the presidential election in 2018 which Mr Maduro went on to win, he wrote: "On 20 May 2018 we showed that we don't take part in a farce. "A new farce would only worsen the crisis we're in. Only by putting an end to the usurpation and with a clear referee will there be free elections," he added, reiterating the opposition's demand for President Maduro to step down and for presidential elections to be held.