I went looking for some insight into why Cheney would lash out at the relationship between Howard Dean and his mother (eg. Cheney: "Maybe his mother loved him, but I've never met anybody who does.") My first thought was
is Howard Dean's mother alive since Cheney uses the past tense -- "loved". So I started looking for info and I'm still looking. I haven't found anything that says Dean's mother has passed but it is still an unusually school-yard, mean-spirited remark. My next thought was 'what was/is Cheney relationship with HIS own mother and I have yet to find a bio on him that mentions either of his parents but I did find the info here.
More of Cheney's damage:
Championed Donald Rumsfeld for Defense Secretary
"insisted, over fierce objections by Secretary of State Colin L. Powell, on placing Paul Wolfowitz in the number two position at the Pentagon"
"insisted, again over Powell's misgivings, on making ultra-unilateralist John Bolton, then vice-president of the American Enterprise Institute (AEI), undersecretary of state for arms control and international security.
http://www.sourcewatch.org/index.php?title=Richard_Cheney