X0206 3 2017-11-07 1 0000028412 COMERICA INC /NEW/ CMA 0001520421 Smith Barbara 1717 MAIN STREET MC 6404 DALLAS TX 75201 1 0 0 0 EXHIBIT 24 - POWER OF ATTORNEY FOR BARBARA R. SMITH /s/ Jennifer S. Perry, on behalf of Barbara R. Smith 2017-11-14