-CP-The estate of Indigenous artist Norval Morrisseau is seeking dismissal of a lawsuit alleging he sexually assaulted a fellow painter, saying the accuser is engaged in a “defamation campaign” that began after being denied a bid to be promoted as Morrisseau’s “artistic successor.” The estate says in its response to the British Columbia Supreme Court lawsuit by Mark Anthony Jacobson that Morrisseau “was in no position to be physically or socially aggressive” at the time of the alleged 2006 assault. It says he “had no libido,” was held upright in a wheelchair by straps, and was in the advanced stages of Parkinson’s disease, dying of complications from the condition the next year at the age of 75. None of the claims by Jacobson or the estate have been tested in…