Former Michigan Secretary of State Terri Lynn Land (R) has two new ads slamming Rep. Gary PetersGary Charles PetersGOP Senate challenger in Michigan raises .5 million in less than a month A better way to protect small businesses from cyberattacks Hillicon Valley: Critics push FTC to get tough on YouTube | Analysts expect regulatory trouble for Facebook's cryptocurrency | Senators to get election security briefing | FBI, ICE reportedly using driver's license photos for facial recognition MORE (D-Mich.) for opposing the Keystone XL pipeline and tie him to billionaire environmentalist Tom SteyerThomas (Tom) Fahr SteyerSunday shows - Immigration raids dominate Steyer defends past investments in fossil fuels The Hill's Campaign Report: Democratic infighting threatens 2020 unity MORE.


"Steyer could make millions by stopping the Keystone pipeline, and Peters stood with Steyer, voted against energy independence, killing jobs, increasing oil and gas prices. Gary Peters: Working for billionaires, not Michigan," one of the ads says.

The ads mirror those Peters and his allies have run attacking Land for the support she's received from the billionaires Charles and David Koch's Americans for Prosperity.

The ads don't explain how Steyer could profit by blocking the pipeline, though one says he "could make millions by killing the pipeline from investments in Keystone's competitor."

Land's campaign says Steyer might be invested in natural gas or green energy products that could go up in value if Keystone is blocked.

A poll conducted for a pro-Keystone XL group released on Wednesday found Peters ahead in the race by 42 percent to 35 percent, though it also found that opposing Keystone could hurt him in the race.

— This post was updated at 12:37 p.m.