Maybe not the best source for this but according to the Sindo longtime Sligo Cllr Sean McManus is about to leave SF, the 3rd SF Cllr in a week. The article does not make any mention of his son who is also a Sligo Cllr. If true it would indicate a full blown crises within SF. Cllr McManus was a SF Cllr at a time before it was popular to be one, a longtime stalwart, he was one of SF's key targets to win a Dail seat.
<DC> Here is the article from the Sunday Independent.