I am overwhelmed by the replies. Thanks everybody.
For the record, so no one does any unnecessary research on this problem I was having, the problem was ME. The tractor started fine after I opened the throttle more than what is/was normal for a normal weather start. I've only had this tractor since spring.
For those of you with insatiable couriousity, this tractor does not have glow plugs. It does not have a manifold heater. It does not have any feature with the key switch, other than OFF, ON, START. It does have a block heater that plugs in to a standard 110v household outlet. I have never used it, and the morning I had the non-start problem the power was out due to snow storm.
My tractor has a "button" on the fuel pump (I had previously used the term "fuel control", which is a correct term for my line of work). This "button" purpose is similar to a choke on a gas rig; to enrich the mixture for cold start. I was concerned that this was not working as advertised because it would not start, so I made this post. As it turned out, simply opening the throttle more than usual did the trick. It was all me and I do feel embarassed. I do thank everybody for your advice and tips. The next morning was even colder, at 14 degrees. I pushed the button in, opened the throttle about 1/3, cranked for about 3 or 5 seconds and it started. Still haven't used the block heater, but I think I will begin doing so on really cold mornings for engine longevity reasons.
I was premature in asking for help. It's not the first time I have ask questions before really exhausting all avenues. I admit that I have gotten accustomed to relatively quick and helpful responses here on this site. Maybe this is a testament to the value of Macon's creation. (And I will say I do enjoy the friendship and "talk". Thanks again