HELENA, Mont. (AP) — The latest campaign finance report for U.S. Rep. Denny Rehberg still contains a larger portion of donors with no reported occupation than his opponent, U.S. Sen. Jon Tester.

Campaign finance reports filed early last week show the Rehberg campaign left blank the occupation for about one of every seven of its individual donors itemized on the report. Only a very small fraction of Tester's donors left the occupation blank.

The Rehberg campaign also pointed out many of the unreported occupation come from small-money donors, and said it is not uncommon for a campaign quickly growing its donor list to have some incomplete records.

The Senate battle between Rehberg and Tester is one of the more closely watch matchups in the nation as both parties vie for control of the Senate.