Most Senators who do go on to contest elections usually have the backing of their party establishment.

They are intended to provide a voice from the party establishment that could swing a close contest.

So Ms Davidson won because the party establishment wanted her to.

Once, he backed a local Republican not supported by the party establishment.

He decided against this when the party establishment united behind Stuart Murray.

Some of these candidates have won office or are backed by the party establishment in their state.

What decide the contest, he said, are Republican legislators and the party establishment.

The Republicans here are all part of the party establishment.

If any group tried that today, it would be crushed by the party establishment.

But he is part of the party establishment.