At his private golf club... Trump referred to Nevada's governor as a "clubhouse politician."

[Demovictory9]

Link to tweet

[soothsayer]

1. What does that mean?

I’m sort of really out of the loop on political speak.

[ProfessorGAC]

2. I Think(!) It's A Synonym For Machine Politician

Perhaps connected to state & local machines like Tammany Hall where the state/city was run from the club's headquarters.
PINO probably means it as an insult because he's this "rebel, outsider".
Best guess.

[soothsayer]

5. Thank you

[no_hypocrisy]

6. To Trump, it's only okay to be a Machine Politician as long as he's the Machine.

[3Hotdogs]

3. I believe it refers to political "machines," such as Boss Tweed's Tammany Hall.

Tweed only held one political office. N.Y. Assembly.

The party officials met in the Dem. party headquarters, Tammany Hall.

Tweed's biography is an extraordinary read.

[soothsayer]

4. Thank you

[JDC]

7. Says the Dotard from the actual clubhouse

He really is completely incompetent on every level.