Institutional Revolutionary Party, or PRI, candidate Enrique Peña Nieto has reached the end of the campaign with a comfortable lead over his rivals in all the polls published in Mexico on Wednesday, the last day that poll results can be released before next weekend's presidential election.
Peña Nieto has a lead over leftist candidate Andres Manuel Lopez Obrador that ranges from 10 percentage points in the Reforma newspaper's poll to 18.6 percentage points in the GEA/ISA poll published by the daily Milenio.
The PRI candidate drew the support of 41 percent of likely voters, excluding undecided voters and voters who did not wish to express a preference, while Lopez Obrador, candidate of the leftist Progressive Movement coalition, got only 31 percent support in the Reforma poll.
Peña Nieto's support slipped by one percentage point in the past week, while Lopez Obrador saw his support rise by one percentage point.
The Reforma poll of 1,616 voters was conducted June 21-24 and has a margin of error of 2.7 percentage points.
Josefina Vazquez Mota, candidate of the governing National Action Party, or PAN, is in third place, with 24 percent support, while Gabriel Quadri, of the New Alliance Party, or PANAL, drew the support of 4 percent of likely voters.
The poll excludes the 19 percent of respondents who described themselves as undecided or did not wish to express a preference, Reforma said.
Peña Nieto has the support of 46.7 percent of likely voters in the GEA/ISA poll published by the daily Milenio, giving him a lead of nearly 20 points over Lopez Obrador, who got the backing of 28.1 percent of likely voters.
The GEA/ISA poll of 1,152 people was conducted June 24-26.
The PRI candidate got 44 percent support to Lopez Obrador's 28 percent in the BGC poll published by the Excelsior newspaper.
The BGC poll of 1,200 people was conducted June 22-24 and has a margin of error of 2.9 percent.
A Buendia & Laredo poll of 2,000 people conducted June 22-24 and published Wednesday in the El Universal newspaper gave Peña Nieto a lead of 17.1 percentage points over Lopez Obrador, a former Mexico City mayor.
Peña Nieto got the support of 45 percent of likely voters to Lopez Obrador's 27.9 percent in the Buendia & Laredo poll, which has a margin of error of 2.5 percent.
The 90-day presidential campaign, which officially started on March 30, ends on Wednesday night.
The election law reforms enacted in 2007 and 2008 cut the length of the official campaign period in half.
Mexico will hold its presidential election next Sunday, selecting a successor to President Felipe Calderon.
Nearly 80 million Mexicans will be eligible to vote for a new president, 628 legislators and thousands of other officials in the general elections.