Republicans in the U.S. House of Representatives unveiled long-awaited legislation on Monday to repeal much of the Obamacare healthcare law, including its expansion of the Medicaid program for the poor. President Donald Trump and fellow Republicans in Congress have repeatedly promised to repeal and replace former Democratic President Barack Obama's signature domestic policy achievement known as the 2010 Affordable Care Act. It was not immediately clear if the bill had enough support to pass the Republican-led Congress. It goes next to two House committees for review. The proposal would freeze enrollment in Obamacare's expanded Medicaid program on January 1, 2020. States that expanded Medicaid could still sign up individuals until the end of 2019, and continue to receive enhanced federal funds…