KEY POINTS
  • Republican Sen. Joni Ernst faces a tight race against Democratic challenger Theresa Greenfield to secure her seat as Iowa's representative.
  • Ernst billed herself in 2014 as the candidate who would face the entrenched power in Washington and "make 'em squeal." This time, voters will decide if she's lived up to that promise.
  • Greenfield has seen an influx of money and attention from national Democratic groups, which her detractors have used to suggest she may be influenced by more progressive members of her party.
Democratic senate candidate Theresa Greenfield (L) and Senator Joni Ernst, R-IA (R).

Republican Joni Ernst minced no words in her first televised ad of her successful Senate bid in 2014.

"I grew up castrating hogs on an Iowa farm. So when I get to Washington, I'll know how to cut pork," the then-state senator says in the ad before the camera cuts to footage of pigs. "Washington's full of big spenders. Let's make 'em squeal."