Now that the majority of House Republican Caucus members said they have no confidence in Speaker Glen Casada's leadership, unless he steps down, talk of a special legislative session is heating up.

Indeed, late Monday evening, Republican Gov. Bill Lee said that he is prepared to call a special session if Casada does not resign as speaker. 

"Today House Republicans sent a clear message, and I'm prepared to call a special session if the Speaker doesn't resign," Lee said in a statement.

So what does all the talk of a special session of the Tennessee General Assembly mean? Here's your primer:

What is a special session?
A special session, also known as an "extraordinary session," is when the General Assembly convenes to take up a particular issue. 

In this case, it would likely be whether to expel Casada from the House of Representatives.

Tennessee's first special session was held in 1796, the year it became a state, when members returned to Nashville to elect representatives to Congress.

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