John Phillippe, general counsel of the RNC, contended in a letter to the secretaries of state in Nevada, Ohio, Kansas, North Carolina, Missouri and Colorado that voting machine errors caused some early votes cast for Gov. Mitt Romney to be credited to President Barack Obama.

Phillippe said in the letter that the RNC learned about the alleged voting machine errors from media and citizen reports.

"I understand that, in a significant number of cases, voting machines in your states have populated a vote for Barack Obama when a voter cast his or her ballot for Mitt Romney," Phillippe wrote. "I further understand that the causes of this problem are varied, and include miscalibration and hyper-sensitivity of the machines."

Phillippe asked that election officials in the six states re-calibrate the voting machines on election day or one day before the elections. It also asks that additional technicians be available on Election Day in case of "increased calibration problems."

Phillippe also called on election officials to ensure that voters are reminded to "double-check that the voting machine properly recorded their vote before final submission."