The Tea Party's 5 biggest 2016 problems

As the 2016 GOP presidential primaries get closer, many conservatives have been growing increasingly hopeful that this will be finally the year they determine their party's nominee.

It's a tall order. The Tea Party has shown it can push GOP politicians to the right and win one-off Senate primaries. But taking on the establishment in an expensive, months-long slog of primaries and caucuses across the country is a more difficult proposition. Even when Mitt Romney looked weak in 2012, the Tea Party didn't manage to coalesce around a viable alternative.