INTRANSIGENT

refusing to compromise

impervious to pleas, persuasion, requests, reason
SYN - adamant, inexorable
"In intransigent conservative opposed to every liberal tendancy."

"Just like his intractable predecessor, this leader was completely intransigent when it came to the war in Iraq."

"He couldn't deal with her intransigent nature when it came to almost every political belief that she had."

"How, having studied the amount of philosophy which he had, could he ever be so intransigent on so many topics - where had his skepticism gone."

"He hated having to deal with these intransigent people, whether it be the left, the right, or the so-called "the independents.""