Hoping to duplicate the massive turnout from January’s women’s march, activists in Chicago and beyond are busy spreading the word about a Tax Day protest Saturday aimed at pressuring President Donald Trump to release his tax returns.

Like the women’s march, Saturday’s event in Chicago will coincide with similar demonstrations in cities across the country. The downtown event kicks off at 11 a.m. with a rally in Daley Plaza followed by a march. With meteorologists predicting temperatures near 80 degrees and thousands indicating via social media that they’re ready to march, the turnout could be sizable.

But be warned: Getting around downtown might be tough. Chicago police and emergency management officials were…