WASHINGTON (AP) — More families with higher incomes could claim the popular child tax credit under a bill that won approval Friday in the House. But in a dispute that divides Republicans and Democrats, millions of the poorest low-income families would still lose the credit in 2018, when enhancements championed by President Barack Obama are set to expire.

The bill would gradually boost the amount of the $1,000-per-child tax credit by tying it to inflation, so it would go up as consumer prices rise. It also aims to make a dent in illegal immigration by prohibiting people without Social Security numbers from claiming a portion of the credit reserved for low-income families.