Heat 2 tablespoons butter in small saucepan and add remaining broth.
Keep adding broth as needed so there is always a 1/4-inch liquid layer over the rice.
Add broth and cover, cooking over low heat until done.
If necessary, add more water or broth and cook a few minutes, stirring occasionally.
Stir mixture, and again add enough broth to just cover rice.
Strain and measure, adding additional broth if needed to make 4 cups.
Return heat to high if you lowered it, and add broth to pot.
If too dry, add a bit more hot broth.
Add the wine and broth and reduce by half over high heat.
Add broth; lower heat to medium, cover, and cook 3 minutes.