LANSING (AP) — Money is abundant in Michigan’s competitive U.S. Senate race, in which a campaign-finance expert projects spending will top a staggering $100 million by Election Day.

First-term Democratic Sen. Gary Peters said Thursday his campaign raised more than $14 million in the previous three months, again setting a state record for a Democratic Senate candidate and eclipsing his $5.2 million haul in the second quarter. Polling has shown Peters to be slightly ahead against Republican challenger John James in what could be a tight race.

The Senate Leadership Fund, a GOP super PAC run by allies of Senate Majority Leader Mitch McConnell, announced a two-week $9 million ad buy to target Peters.

The third-quarter numbers for James, who has outraised Peters, were not immediately available.