Venezuelan President Nicolas Maduro shocked many of his countrymen on Monday by calling for a constitutional assembly in a move similar to one his predecessor and mentor Hugo Chavez used almost 20 years ago.

But there is a key difference: while Chavez enjoyed broad popularity following his 1998 election, Maduro faces slim odds at the ballot box and critics say he is calling the assembly precisely to avoid or delay free elections.

After he took office in 1999, Chavez led a campaign to create an assembly that rewrote the constitution, letting him name allies to crucial posts such as the Supreme Court. He thus consolidated an already strong hand in institutional disputes with adversaries during his 14-year rule.