Obamacare replacement bill takes center stage in U.S. Senate

By Richard Cowan and Susan CornwellWASHINGTON (Reuters) - A seven-year push by U.S. Republicans to dismantle Obamacare and kill the taxes it imposed on the wealthy will reach a critical juncture on Thursday when Senate Republican leaders unveil a draft bill they aim to put to a vote, possibly as early as next week.Senate Majority Leader Mitch McConnell and his lieutenants have worked in secret for weeks on the bill, which is expected to curb Obamacare's expanded Medicaid help for the poor and re