Douglas Harper's Etymology Dictionary
in U.S. political jargon, usually meaning "moderate; independent," 1881, from elements of the names of the two dominant parties; see from republican (n.) and democrat (n.).
Wikipedia
Republicrat or Demopublican (also Repubocrat, Demican, Democan, and Republocrat ) are portmanteaux names for both of the two major political parties in the United States, the Republican Party and the Democratic Party, collectively. These derogatory names first appeared in the presidential election of 1872.
Usage examples of "republicrat".
Roebling was not a Republicrat, but he was not without influence in Washington.
But what was worse was that the Republicrat administration and the Congress were considering going to the aid of the Mexican government with an active invasion.
At the first sign of resistance, these cowardly checkpants Republicrats ran for cover with their collective tails between their golf bags.
In the eighties, before the Republicrats took over, a Conservative president whose name escapes me at the moment risked a direct confrontation with the Russian air and naval forces by wiping out the military capability of three of the Middle Eastern nations who trained and financed terrorists.
Republicrats and Demicans prevail, these illegals may be given amnesty and allowed to vote.