Working staff prepare for Mitt Romney Election Night Rally in Boston, Nov. 6, 2012. The quadrennial U.S. presidential elections kicked off Tuesday. (Xinhua/Shen Hong)

Working staff prepare for Mitt Romney Election Night Rally in Boston, Nov. 6, 2012. The quadrennial U.S. presidential elections kicked off Tuesday. (Xinhua/Shen Hong)

A video journalist works at the venue for Mitt Romney Election Night Rally in Boston, Nov. 6, 2012. The quadrennial U.S. presidential elections kicked off Tuesday. (Xinhua/Shen Hong)

Journalists work at the media centre inside the venue for Mitt Romney Election Night Rally in Boston, Nov. 6, 2012. The quadrennial U.S. presidential elections kicked off Tuesday. (Xinhua/Shen Hong)

A working staff prepares for Mitt Romney Election Night Rally in Boston, Nov. 6, 2012. The quadrennial U.S. presidential elections kicked off Tuesday. (Xinhua/Shen Hong)

A working staff prepares for Mitt Romney Election Night Rally in Boston, Nov. 6, 2012. The quadrennial U.S. presidential elections kicked off Tuesday. (Xinhua/Shen Hong)

A working staff prepares for Mitt Romney Election Night Rally in Boston, Nov. 6, 2012. The quadrennial U.S. presidential elections kicked off Tuesday. (Xinhua/Shen Hong)

A working staff prepares for Mitt Romney Election Night Rally in Boston, Nov. 6, 2012. The quadrennial U.S. presidential elections kicked off Tuesday. (Xinhua/Shen Hong)

A working staff prepares for Mitt Romney Election Night Rally in Boston, Nov. 6, 2012. The quadrennial U.S. presidential elections kicked off Tuesday. (Xinhua/Shen Hong)