With Venezuela’s socialist President Nicolas Maduro hanging on to power after the opposition leader Guaido declared himself acting interim president, these are their respective key supports, inside and outside the OPEC member:

Military

The Venezuela armed forces are considered the backbone of the government, and on Thursday senior military officers reaffirmed support for Maduro.

Of 32 cabinet ministers, nine are from the military and run portfolios such as Defense, Interior, Agriculture and the intelligence service, as well as state oil giant PDVSA, which contributes 96 percent of the country's income. They also control a television station, a bank and a vehicle assembly plant, among other companies.

International creditors and allies

Countries such as Russia, China Turkey, Cuba, Bolivia, Uruguay and Mexico -- as well as Iran and North Korea -- continue to recognize the 56 year-old Maduro.

Justice

Venezuela's Supreme Court of Justice (TSJ) supports the Maduro regime. Court justices were chosen by the pro-government National Assembly in December 2015, just days before the opposition took control of the legislature.

National Constituent Assembly

Maduro convened the staunchly pro-government assembly after four months of opposition protests that left about 125 dead in 2017. It has absolute powers, and serves as the de facto legislature. The opposition says it was created illegally.

Electoral authority

The National Electoral Council (CNE), in charge of running elections, is chaired by the openly pro-government Tibisay Lucena. Under her management several opposition parties have been disqualified, and on Thursday it issued a statement endorsing Maduro.

International support

When Guaido proclaimed himself acting interim president US President Donald Trump quickly recognized him. Other countries, including Brazil, Colombia, Argentina and Australia, quickly followed. On Sunday Israel said it would recognize Guaido as president.

Six European countries -- Spain, France, Germany, Britain, Portugal, the Netherlands -- on Saturday demanded that either Venezuela call elections within eight days or they would recognize Guaido as interim leader. Some European countries such as Greece still support Maduro.

National Assembly

The opposition-controlled National Assembly was elected in 2015, when a coalition of opposition parties handed the leftist regime its biggest electoral defeat ever.

Justice in exile

A Venezuelan Supreme Court in exile, with members appointed by the National Assembly, on Wednesday welcomed Guaido's "will" to take over as acting leader pending new elections.