Republican negotiators in the U.S. Congress on Friday expanded a child tax credit that is part of sweeping tax legislation in order to shore up support for passage, but it was still unclear whether the move was enough to satisfy two balking senators. Republican Representative Kristi Noem said on Friday that the refundable portion of an expanded child tax credit in the tax bill under negotiation has risen to $1,400 from $1,000, an apparent bid to win support from Republican Senators Marco Rubio and Mike Lee. Noem said, referring to Rubio, “I believe we’re in a good spot and should be able to earn his support."