(CNN) - If Hillary Clinton ends up winning more than 70.05 percent of the vote in West Virginia tonight, she will have her best showing of the campaign to date.
Clinton's biggest victory so far this campaign came in the Arkansas primary on Super Tuesday, February 5, when she beat Barack Obama 70.05 percent to 26.25 percent - the Illinois senator's poorest showing to date.
The Arkansas primary marked the only contest so far where Clinton reached the 70 percent vote threshold. So far Obama has reached or exceeded 70 percent in five contests: the DC primary (75 percent), and the caucuses in Alaska (75 percent), Hawaii (76 percent), Idaho (79 percent), and Kansas (74 percent).
Clinton's second best showing was in the Rhode Island primary on March 4, when she captured 58 percent of the vote.