MUSCATINE (AP) — Iowa’s toss-up status in the presidential race has made it a frequent stop for candidates, and the state has become even more popular since early balloting began last week.

Ballots are already in the hands of more than 247,000 Iowans who requested them by mail. Voters have turned in about 43,800 of the ballots, with Democrats leading Republicans in submitted ballots by a ratio of about 3-1.

With many more ballots set to stream in, candidates are heading to Iowa to make another pitch to voters.