President Coolidge's state, in short?

I believe the answer is:

cal

I'm a little stuck... Click here to teach me more about this clue!

This could be a double definition.

'president coolidge's' is the first definition.
(I've seen this in another clue)

'state in short?' is the second definition.
'cal' can be an answer for 'state' (short for California). I'm not sure about the 'in short?' bit.

Can you help me to learn more?

I've seen this clue in the Evening Standard.

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