Sen. Debbie Stabenow (D-Mich.) raised more than $1 million in the last three months, a source in her campaign told The Hill Tuesday, slightly outpacing both of her primary opponents in the quarter.

The source refused to divulge Stabenow's exact totals or cash on hand, but she had more than $4.1 million in the bank at the end of the last quarter so unless she had a terrible burn rate the final numbers will be above that.

Stabenow will face the winner of the Republican primary between former Rep. Pete Hoekstra (R-Mich.), who raised $1 million in the last quarter, and Detroit Christian charter schools founder Clark Durant, who got off to a quick fundraising start with $750,000 in the first six weeks of his campaign.

A recent poll of primary voters showed that more than 40 percent backed Hoekstra, while Durant, who lacks much name recognition at this point, had just 3 percent support. Most polls of the race show Stabenow with big leads over her challengers and hovering around 50 percent, the line at which incumbents are usually considered safe.

Hoekstra could be forced to spend a decent chunk of money to ward off Durant, meaning Stabenow's cash on hand advantage over her opponents could grow rather than shrink as the race wears on.