Underwood says talk of raising cap on state and local deduction on federal taxes in play as Congress examines funding infrastructure plan

Underwood, of Naperville, and U.S. Rep. Sean Casten, a Downers Grove Democrat, are co-sponsors of legislation that would increase the $10,000 SALT cap to $15,000 for individual filers and allow people married and filing jointly to double their deduction up to $30,000. Future deduction amounts would be indexed to inflation.