CARACAS  - Venezuela plunged into uncertainty Monday, with acting President Nicolas Maduro due to be proclaimed the winner of a tight election to succeed the late Hugo Chavez despite international pressure for a recount.

After Chavez dominated elections for 14 years, his political heir barely defeated opposition rival Henrique Capriles -- by just 235,000 votes -- in a nation deeply divided by the late president's oil-funded socialist revolution.