Venezuela's opposition leader and presidential candidate Henrique Capriles greets supporters during a campaign rally in the state of Guarico April 8, 2013. Venezuela will hold presidential elections on April 14. (Photo by Carlos Garcia Rawlins/Reuters)

Venezuela's opposition leader and presidential candidate Henrique Capriles throws his cap to supporters during a campaign rally in the state of Guarico April 8, 2013. Venezuelans will hold presidential elections on April 14. (Photo by Carlos Garcia Rawlins/Reuters)

Supporters of Venezuela's opposition leader and presidential candidate Henrique Capriles attend a campaign rally in the state of Merida April 10, 2013. Venezuelans will hold presidential elections on April 14. (Photo by Carlos Garcia Rawlins/Reuters)

Venezuela's acting President and presidential candidate Nicolas Maduro kisses a painting of late Venezuelan president Hugo Chavez during a campaign rally in the state of Vargas April 9, 2013. Venezuelans will hold presidential elections on April 14. Maduro promised on Tuesday to hike Venezuela's minimum wage by about 40 percent if he is elected in a weekend vote to replace late socialist leader Chavez. (Photo by Carlos Garcia Rawlins/Reuters)

Venezuela's opposition leader and presidential candidate Henrique Capriles (2nd L) greets supporters during a campaign rally in the state of Merida April 10, 2013. Capriles denied on Wednesday accusations from acting President Nicolas Maduro that he would scrap popular welfare policies if he wins Sunday's election. (Photo by Carlos Garcia Rawlins/Reuters)

A street artist stands in front of a wall with graffiti showing late Venezuela President Hugo Chavez and current acting President and presidential candidate Nicolas Maduro in Caracas April 10, 2013. Venezuelans will hold presidential elections on April 14. The graffiti (L and C) read, “We are all Chavez”. (Photo by Tomas Bravo/Reuters)

Venezuela's opposition leader and presidential candidate Henrique Capriles (R) greets supporters during a campaign rally in the state of Guarico April 8, 2013. Venezuela will hold presidential elections on April 14. (Photo by Carlos Garcia Rawlins/Reuters)

Venezuela's opposition leader and presidential candidate Henrique Capriles (C) greets supporters during a campaign rally in the state of Zulia April 10, 2013. Venezuelans will hold presidential elections on April 14. (Photo by Isaac Urrutia/Reuters)

Venezuela's opposition leader and presidential candidate Henrique Capriles greets supporters during a campaign rally in the state of Zulia April 10, 2013. Venezuelans will hold presidential elections on April 14. (Photo by Carlos Garcia Rawlins/Reuters)

Venezuela's opposition leader and presidential candidate Henrique Capriles (R) greets supporters during a campaign rally in the state of Merida April 10, 2013. Capriles denied on Wednesday accusations from acting President Nicolas Maduro that he would scrap popular welfare policies if he wins Sunday's election. (Photo by Carlos Garcia Rawlins/Reuters)

Venezuela's opposition leader and presidential candidate Henrique Capriles (C) speaks to supporters during a campaign rally in the state of Zulia April 10, 2013. (Photo by Carlos Garcia Rawlins/Reuters)

Venezuela's acting President Nicolas Maduro holds up a painting of Hugo Chavez during a campaign rally in Catia La Mar, on April 9, 2013. Maduro, the hand-picked successor of Chavez, is running for president against opposition candidate Henrique Capriles on April 14. (Photo by Ariana Cubillos/Associated Press)

Venezuela's acting President and presidential candidate Nicolas Maduro (R) greets supporters during a campaign rally in the state of Vargas April 09, 2013. Venezuelans will hold presidential elections on April 14. (Photo by Carlos Garcia Rawlins/Reuters)

Supporters wave their hands as one of them holds a mask of Venezuela's acting President Nicolas Maduro during a campaign rally in Catia La Mar, Venezuela, Tuesday, April 9, 2013. Maduro, the hand-picked successor of late President Hugo Chavez, is running for president against opposition candidate Henrique Capriles in the presidential election set for Sunday, April 14. (Photo by Ariana Cubillos/AP Photo)