remove "request for withdrawal from the union petitions" and state that such measures must be requested by the states.

The petitions requesting "withdrawal" are over-filling this site, and such petitions serve no useful purpose. Even if such was proper, such requests should first be presented by the state governments requesting independence.
In any event, these petitions are not really about sucession, but about disagreement with some government policies.
This petition was placed here because those petitions are obstructing the legitamate petitions on this site.