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Senate Majority Leader Mitch McConnell may have bought himself some time by delaying a vote on his embattled health-care bill, but he faces a difficult and narrow path in trying to deliver on seven years of promises to repeal Obamacare and its taxes.

Senate leaders put off a vote on the Republicans’ health-care bill until after the July 4 recess amid growing opposition from GOP members to the plan drafted in secret by Majority Leader Mitch McConnell.

Congressional Republicans’ dash to undo Obamacare is about fulfilling a seven-year promise to voters. But it’s also about seizing what may be the party’s last chance to wipe out the 2010 law’s tax hikes on upper income earners.

The Obamacare replacement plan put forward by Senate Republicans would increase the number of uninsured Americans by 22 million while slashing funding for Medicaid, according to an estimate by the Congressional Budget Office.

Senate leaders released a slightly revised version of their health-care bill Monday as Senate Majority Leader Mitch McConnell tries to win over enough holdouts to pass the measure, with at least six Republicans signaling opposition.

A look at the provisions of the Senate plan and how they differ from the House version of the legislation.

The long-awaited Obamacare replacement plan from Senate Republicans wouldn’t do much to preserve coverage for millions of poor and working-class people, but it would deliver tax cuts to the wealthiest Americans.

Senate Republicans’ proposal to replace Obamacare would provide an additional $50 billion over four years to stabilize insurance exchanges, relying on a mechanism Republicans have criticized in the past as a way to keep insurers in the marketplace.

The measure would eliminate Obamacare’s tax increases, including a 3.8 percent net investment income tax, a 2.3 percent levy on medical device sales, a 0.9 percent Medicare surtax and a 10 percent indoor tanning tax. But a tax on expensive “Cadillac” employer-provided plans would be delayed, as in the House measure.

Senate Republicans are beginning to learn the details of the health-care bill they may be asked to vote on next week, with senators saying the measure envisions a more gradual transition away from Obamacare than the House-passed version.