The House Republican multi-trillion-dollar tax package includes a bigger child tax credit. If enacted, here's who could benefit from the changes.

U.S. Senate Republicans said on Thursday they will seek substantial changes to President Donald Trump's sweeping tax and spending bill after it narrowly won approval in the House of Representatives, in a sign that significant hurdles remain for the package.

Republicans say the 1,000-page-plus bill is what voters sent them to accomplish. Critics say it adds to deficits while harming poor Americans.