Repealing the Affordable Care Act could lead to about 15 million people losing their health insurance coverage, according to Ana Gupte, a Wall Street analyst at Leerink Partners.

Senator John McCain has said he cannot support his fellow Republicans' latest effort to repeal Obamacare, dealing it a potentially fatal blow.

John McCain returns to vote in favor of motion to proceed to debate

The U.S. Senate on Tuesday voted to begin formal debate of healthcare legislation that would repeal major elements of Obamacare and possibly replace it with a less costly program.

President Donald Trump has declared Obamacare "dead" after the Republican healthcare bill was narrowly passed by the lower chamber of Congress.

Republican politicians have campaigned on repealing President Barack Obama's healthcare reforms pretty much since they were enacted in 2010.

Factions of both moderate and conservative GOP senators are deeply skeptical of the bill for entirely different reasons