Republican-aligned American Action Network is investing another $500,000 into Minnesota’s hotly contested 8th district race on behalf of freshman GOP Rep. Chip Cravaack, Roll Call has learned.

With the additional reservation, AAN is now scheduled to spend $1 million from today through Election Day to help Cravaack survive a stiff challenge from former Rep. Rick Nolan (D). That includes $700,000 in television time in Minneapolis, $200,000 in Duluth and $100,000 online. The group had already spent $700,000 on the race.

The 8th district is one of the biggest House targets of spending from outside groups. The additional money from AAN indicates that Republicans believe the race is close, but winnable.

Roll Call rates it as a Tossup.