Poll workers from opposing sides in the presidential race apparently clashed in a physical altercation Friday at a Cuyahoga Falls [OH] nursing home when one accused the other of improperly marking a ballot. The incident is being investigated by both the police and the Summit County elections board. The board probe could lead to a closer examination of the other votes with which the Democrat poll worker was involved.The alleged assault piqued the interest of Sen. John McCain's presidential campaign -- as the voter in question reportedly wanted to vote for McCain but her ballot was initially marked for Sen. Barack Obama.