[1] Miguel Vargas is the extra marital son of Altagracia Maldonado and Pedro Antonio Rivera Abreu, an agro-industrial businessman and politician.

Vargas received a substantial inheritance from his biological father, who was serving as senator for La Vega Province when he died in a car accident in 1994.

Vargas is currently married to María de los Ángeles García Frangie, and has three children: Alberto Manuel, Alan Omar, and Miguel Paúl.

[2] On 28 January 2007, Vargas Maldonado beat his opponent Milagros Ortiz Bosch, with about 80% of the votes, thus becoming the official candidate of the PRD to the Presidency of the Republic for the elections of 16 May 2008.

His election campaign was based on his proposals to deal with pressing problems of the Dominican people as unemployment, crime, homelessness and high tax rates, as well as criticism of the government administration of President Leonel Fernandez Reyna (2004–2008 ).

The loser pre-candidate Vargas, claimed that some records in his favor were not counted, and other members of opposing parties, as the PLD and PRSC, could vote at this convention not having been excluded from the list of voters.

[3] In January 2014 was the subject of controversy when it was discovered that received a loan from the Banco de Reservas on 13 December 2011 for $15 million, well above the equity amount Vargas said owning earlier this year, although the offered guarantees were previously rejected by the management of the Bank Valuations.