WILMINGTON, Del. - President-elect Joe Biden is set to introduce Miguel Cardona as his pick for education secretary on Wednesday, choosing Connecticut's education chief and a lifelong champion of public schools to lead the department.The selection delivers on Biden’s promise to nominate someone with experience working in public education and would fulfill his goal of installing an education chief who stands in sharp contrast to Secretary Betsy DeVos.Unlike DeVos, a school choice advocate whom Biden says is an opponent of public schools, Cardona is a product of them, starting when he entered kindergarten unable to speak English.Biden and Vice President-elect Kamala Harris will hold an event with Cardona in Wilmington, Delaware, where he's.