It wasn't for that reason that he looked at Tom. When Geary said that, Mike made no reaction although you could tell he was seething inside. I looked up the lines and found where it takes place:

Sen. GEARY: The Corleone family has done very well here in Nevada. You own, or, you control, two major hotels in Vegas -- one in Reno. The licenses were grandfathered in, so there is no problem with the gaming commission. Now, my sources tell me that -- you plan to make a move against the Tropicalla. They tell me within a week -- you're gonna move Klingman out. (This is where he looks at Tom) That's quite an expansion. However it will leave with one little technical problem. Ahh -- The license will still be in Klingman's name.

MICHAEL:Turnbull is a good man.


I'm not sure why he glances at Tom. I'm also not sure why Mike replies with "Turnbull is a good man."