Question:

Here is a hand (my partner) and I got a bottom on.  I hold:

AXXX
QXXX
JX
XXX

With opps passing, p opens 1D, I bid 1H, P bids 2C.  What do I bid now?
Was my 1H bid a mistake?

Now, assume diamonds are XXX and clubs are XX.  Same question?

Enjoy the holidays!

My two cents worth,

The 1H bid was perfectly fine.  Now, based on the auction given, I would 
Expect partner to have at least 5 diamonds and 4 clubs and somewhere 
between 12-18 points.  You have a minimum hand for a response, so the 
choices for bids would be between passing 2C and bidding 2D.  Generally, 
I would opt for diamonds, but with a hand like this one:

KJXX
QJXX
XX
XXX

I would have reasonable major suit strength which might protect partner 
from having to ruff, but still not a hand good enough to bid 2NT (@10HCP), 
I might consider opting pass 2 clubs, giving my partner a chance for a 
ruff or two in diamonds to set up that suit.  Even then, it might be iffy.
On the second one, I would bid 2D without hesitation.

John