Republican-affiliated voters have outpaced Democratic-affiliated voters in early voting in seven closely watched states, according to data provided by TargetSmart and independently analyzed by the NBC News Data Analytics Lab.

GOP-affiliated voters have surpassed Democratic-affiliated ones in early voting in Arizona, Florida, Georgia, Indiana, Montana, Tennessee and Texas, the data showed.

Only in Nevada have Democratic-affiliated voters exceeded Republican-affiliated voters so far in early voting, according to the data.