In a stinging blow to President Donald Trump, US Senate Republicans failed on Friday (28 July) to dismantle Obamacare, falling short on a major campaign promise and perhaps ending a seven-year quest by their party to gut the healthcare law. <br /><br />Voting in the early hours, three Republican senators, John McCain, Susan Collins and Lisa Murkowski, crossed party lines to join Democrats in a dramatic 49-to-51 vote to reject a "skinny repeal" bill that would have killed some parts of Obamacare. <br /><br />The setback leaves Trump without a major legislative win after more than six months in power, despite Republicans controlling the White House, Senate and House. It will also be a let-down for financial markets, which expected Trump to make rapid changes to healthcare, taxes and infrastructure spending.