He wants the government to engage in dialogue with the opposition and is disappointed in Guaido's decision to proclaim himself acting president. But he said there will not be a new presidential election until 2025, rejecting a demand by Guaido, president of the opposition-controlled National Assembly.
A lack of export pipeline capacity means Canada will not be able to boost shipments to take advantage of USA sanctions against Venezuela's national oil company, analysts say.
Oil prices rose almost 3 percent on Wednesday, as investors remained concerned about supply disruptions.
Pro-government demonstrators also marched in the capital, at times crossing paths with opposition protesters and shouting "sell outs" and "traitors". "Venezuelan authorities may not notify the U.S. Embassy of the detention of a U.S. citizen, and consular access to detainees may be denied or severely delayed".
Venezuela's opposition has had clandestine meetings with members of the country's military and security forces, Venezuela's self-proclaimed interim president, Juan Guaido, said in an opinion piece published on Wednesday.
The US has emerged as Mr Guaido's most powerful ally, announcing on Tuesday that it was giving him control of Venezuela's US bank accounts. Then, by Wednesday morning, a desperate Maduro was pleading with Americans to stop Trump from intervening on Guaido's behalf and saying he would sit down and talk with the opposition for a peaceful solution.
"I won legitimately", he said.
Cordoba said her children were among the more than 3 million Venezuelans who have left the country in the past couple of years.
It says more than 40 people are believed to have been killed. Hundreds have also been arrested, including children.
Venezuela's opposition plans protests Wednesday to urge the military, the lynchpin of Maduro's beleaguered regime, to dump him in favor of self-declared interim leader Juan Guaido.
He ordered the creation of 50,000 popular defense units, community groups charged with the "integral defense of the fatherland".
The Pentagon has refused to rule out military action, although is it not considered likely by most experts.
Speaking to Russian state TV he said: "Donald Trump has without doubt given an order to kill me and has told the government of Columbia and the Columbian mafia to kill me".
Elsewhere in Venezuela, residents went about their daily routine. The government is eager to blame Guaido for the measures, which, once they begin to bite, could diminish his popularity.
President Trump also noted in his tweet that Guaido "is being targeted by Venezuelan Supreme Court", a reference to a request by the country's attorney general, Tarek William Saab, for the high court to prevent Guaido from leaving the country and block his financial accounts.
"Let's not permit a new Vietnam in Venezuela", Maduro says in the video, posted on Facebook at 11:14 pm Tuesday and directed at the American public.