North Dakota Republican U.S. Senate candidate Rick Berg has a big financial edge over primary challenger Duane Sand.
Berg's Federal Election Commission disclosure reports show he has almost $1.6 million in the bank.
Republican primary opponent Duane Sand filed his disclosure report Sunday.
It shows Sand has about $81,000 in his campaign treasury, and $205,000 in debts.
Sand's report says he raised just over $250,000 in contributions during January, February and March. But he only raised about $700 more than he spent during those three months.
Berg and Sand are competing in the June Republican primary to see who runs in November against Democratic Senate candidate Heidi Heitkamp.
No Democrat filed to run against Heitkamp before last week's filing deadline for getting on the ballot.