The bipartisan plan to stabilize Obamacare is gaining steam — but it still faces one huge challenge

The bipartisan Alexander-Murray Obamacare stabilization bill debuted on Tuesday.
The bill's authors announced 24 co-sponsors in the Senate, 12 in each party.
GOP leadership, especially President Donald Trump, still needs to get on board for it to pass.
The push to stabilize the Obamacare individual insurance exchanges is getting some key support in the Senate, but there is one major hurdle the bill must jump in order to pass.
On Tuesday, Sens. Lamar Alexander and Patty Murray debuted