Update 7:00 AM Wednesday: Romney wins Ohio 38%, Santorum 37%.

Update: Newt wins Georgia.

Update 7:18 pm: Romney wins Virginia.

Update 7:31 pm: Romney wins Vermont.

Update 8:15 pm: CNN, Fox News project Romney will win Massachusetts.

Update 8:17 pm: Fox News calls Oklahoma for Santorum.

Update 8:43 pm: Rick Santorum wins Tennessee.

Update 10:14 pm: Santorum wins North Dakota caucuses.

Update 11:00 pm: Romney wins Idaho caucuses.

Finale update of the night 11:05 pm: Ohio too close to call, 86% reporting, Santorum 38%, Romney 37%