The two candidates for U.S. Senate met face-to-face during a debate on Iowa PBS Monday night after weeks of biting political adds. You can see the full debate here . Incumbent Joni Ernst of Red Oak faces a serious challenge from West Des Moines businesswoman, Theresa Greenfield. A recent poll from the Des Moines Register/Mediacom gave Greenfield a slight lead in the race for the 6-year term. The two candidates were first asked about President Trump’s taxes and if deductions Iowans were hearing