White House says will work with Rubio on child tax credit

"We're really proud of the work that we've done already, up until this point with Senator Rubio, already doubling the child tax credit," White House spokeswoman Sarah Sanders told reporters. "We're going to continue working with the senator, but we think we've made great strides."

(Reporting by Jeff Mason; Writing by Katanga Johnson; Editing by Tim Ahmann)