Newt has no chance at the nomination, for reasons unrelated to his fitness and all related to his experience.
I think Gingrich would need to win nearly every remaining state by wide margins to get the nomination. Even that may not be enough considering the way the table keeps getting tilted in favor of Romney.
Between them, Santorum and Gingrich hold enough delegates to put themselves within 100 of Romney.
Don’t count Newt out! Still 5 mo to go before the Convention and 8 mo to go before Election Day!