[donna]

Isn't character the measure of a man no matter what his occupation?

If Obama had good character, we wouldn't be in such a mess.

[ansel12]

The confusion was not knowing what he was getting at.

Depending on the context of a conversation, “not much of a man” can mean that a man is effeminate, citified, metrosexual, cowardly, and in fact, that is generally what people mean when they say someone is not much of a man, or is unmanly.