Ernesto "El Pato" de Lucas Hopkins (born 5 September 1976) is a Mexican politician.
He is a member of the Institutional Revolutionary Party.
He was Federal Deputy during the LXI Legislature of the Mexican Congress under the principle of relative majority for the III Federal Electoral District of Sonora, which comprises the northern part of Hermosillo, the state capital.
On 20 April 2013 he was fired from this post, less than five months from taking over at this office, probably making him the first senior officer to be fired by President Enrique Peña Nieto.