Senators Mark Warner (D-Va.) and Rob Portman (R-Ohio) submitted a competing amendment on Thursday to an earlier amendment to the Senate infrastructure bill’s cryptocurrency provision. The amendment, a copy of which was obtained by CoinDesk, is limited in scope, excluding only proof-of-work mining, or the selling of hardware or software that permits individuals to control private keys that provide access to digital assets. In a tweet Thursday evening, Jerry Brito, the executive director of the Washington, D.C.-based think tank Coin Center called the amendment "disastrous." He added: "And it does nothing for software ... (full story)