Iowa is a key battleground for Republicans and Democrats to see who will control the Senate after the Nov. 4 midterm elections. 

According to the most recent Real Clear Politics average of recent polls, State Sen. Joni Ernst leads U.S. Rep. Bruce Braley (D) by about two points. Most polls show the race as too close to call. 

Ernst, a grandmother and active lieutenant colonel in the Army Reserves who served in Iraq, won over conservative voters during the GOP primary. 

Ernst has made headlines during the campaign with her unusual ads, including one in which she boasts about castrating pigs while growing up on a farm.

Ernst joined Martha MacCallum this morning to discuss the "Squeal" ad and the other key issues in the closely watched campaign. 

Martha asked whether Ernst can match Braley's ground game as more and more money pours into the race.

She noted that recent reports indicate an increase in requests for absentee ballots by independents and Democrats, pointing to a concerted effort to turn out voters that don't usually show up for midterm elections. 

Ernst said her team is matching Braley on that effort, revealing that Republican requests for absentee ballots have outnumbered requests by Democrat voters in the past five or six days. 

The candidates are set for a second debate tomorrow after their first one resulted in some contentious exchanges

Watch the full interview above.