Democratic Sen. Bruce Braley attacked GOP hopeful Joni Ernst last week . Ernst called his comments offensive in an interview with Fox News on Monday . Ernst is locked in one of the most competitive GOP races Monday in Iowa . `` I should n't have said those things , I know that . A poll released Monday showed Ernst and Democratic challenger Joni Ernst tied .
Democratic Sen. Bruce Braley attacked GOP hopeful Joni Ernst last week . Ernst called his comments offensive in an interview with Fox News on Monday . Ernst is locked in one of the most competitive GOP races Monday in Iowa . A poll released Monday showed Ernst and Democratic challenger Joni Ernst tied .