An Iowa family will join President Donald Trump as he makes his closing arguments for passage of the GOP tax reform plan.Aubyn and Anthony Giampolo of Johnston and four other families will be a White House briefing Wednesday afternoon. The Giampolos, who both work for the West Des Moines Police Department, and the other families were chosen to “ensure that the group visiting tomorrow would be a good representation of the families around the country that stand to benefit from tax reform,” according a member of the White House press office.According to senior White House officials, the president will use their stories and specific tax situations to explain the benefits for middle-class taxpayers of “historic, transformative tax reform” he hopes to sign into law before the end of the year.“This is a great opportunity for the American people to see middle-class families who have similar situations to their own and see how the plan is going to benefit them,” Cliff Sims said on a Tuesday call with reporters.The president is expected to make an aspirational argument for tax reform to young people he has invited to the White House for his speech.“These are the folks who are, for perhaps the first time in American history, (their) parents no longer think their children will be better off than they are,” Sims said.