The US and some other Western nations were quick to recognize Guaido as the country's new leader, while Russia, Turkey, Iran, and China pledged their support for President Nicolas Maduro, who was sworn in for his second term earlier this year.
The White House revealed Wednesday that Trump spoke with Guaido to "congratulate him on his historic assumption of the presidency" and reinforce the United States' support for "Venezuela's fight to regain its democracy".
Alleging that the Maduro administration is illegitimate, Guaido, head of the National Assembly, declared himself interim president during an anti-government rally on Jan 23.
"Venezuela is set on change", Guaido said.
This followed a 2-percent price jump the previous session, when markets first digested the United States sanctions on Venezuela's oil exports.
They are the toughest U.S. financial challenge yet to Venezuela's embattled socialist president, Nicolas Maduro.
"This needs to be taken with utmost seriousness", said Guerra in a speech to lawmakers.
"Hands off Venezuela", Maduro said forcefully in a direct message to Trump.
This move prompted two dozen nations, including the United States and Russian Federation, to pick sides in the Venezuelan humanitarian crisis.
USA imposes sanctions on Venezuela state oil firm PDVSA
On January 23, 696 people were detained across the country, the highest daily number of detentions in Venezuela in 20 years. Guaido, the National Assembly leader, invoked the constitution and declared himself interim leader pending a new election.
Coldest in at least two decades in parts of the Midwest
The "polar vortex" event will have 89 percent of the continental US with below freezing weather, meteorologist Ryan Maue said. Temperatures in most of eastern and central North Dakota will be around 30 degrees below zero on Tuesday night , Schild said.
NFL Admits No-Call In NFC Championship Game, Wants Lawsuit Tossed
With the score tied 20-20 on Sunday and 1:45 remaining in the game, the Saints faced a third-and-10 from the Rams' 13-yard line. The Rams won the January 20 game in overtime and are set to play the New England Patriots in Sunday's Super Bowl .
Venezuelan opposition sympathizers had been urging Guaido to assume the presidency since Maduro was inaugurated to a second term on January 10 following a widely boycotted election previous year that the United States and many other foreign governments described as a fraudulent.
Juan Guaido has the backing of several countries including the U.S. and Australia.
USA military invention is seen in Washington as highly unlikely, but President Donald Trump has repeatedly said "all options are on the table" and notes Bolton held at a Monday briefing containing the words "5,000 troops to Colombia" have raised questions.
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.
He is offering amnesty to soldiers who back his movement and reject Maduro's socialist government.
The Trump administration has imposed sanctions that could starve the already distressed nation of billions in oil revenue - an effort to mount pressure against the defiant Maduro.
Washington's fast action on Venezuela and efforts by Maduro's government to defend its grip on PDVSA have sent shock waves around the world, triggering higher global oil prices and angry responses from China and Russian Federation.
Venezuelan oil exports to the US have declined steadily over the years, falling particularly sharply over the past decade as its production plummeted amid its long economic and political crisis.
Storchak said Venezuela owes Russian Federation $3 billion, and has repayments twice a year of around $100 million, with the next due in March.
Oil firms that had sent tankers to Venezuela to lift crude bound for the United States were ordered by PDVSA on Monday to pay for cargoes before departure, sources told Reuters.