According to the Catholic church the marriage isn't valid to it would make his children illegitimate but heck good luck explaining common sense to a Catholic.
Just curious but how come the Repuplican's SEALED records are exposed without their permission and John Kerry has NO judge helping journalists UNSEALING his divorce papers. The same reasoning was used for the Republican - spare the kids the dirt but with John Kerry they can not be unsealed - no journalist is pursuing it and NO judge is offering it to be "fair" politically speaking.
Your snide comment notwithstanding, whether or not the Church claims the SACRAMENT is valid has no bearing on whether the STATE claims his marriage was legitimate. It is the STATE which determines the legitimacy of children, not the Sacrament conferred by the Catholic Church.
Why do children not become illegitimate when a couple divorces? After all, if legitimacy is determined by whether or not a couple was married legally, why wouldn't the marriage dissolution also remove the childrens' legitimacy? If it doesn't, then anything the Church does won't change that, because the Church never conferred legitimacy upon the children.