All but 3 of the Wisconsin delegates are pledged to Cruz for 3 ballots. They signed that pledge before they were elected at their district Caucuses.
Strong-arming techniques?
Cruz has no right to change the state of Wisconsin’s party rules. Those delegates have no obligation to vote for a suspended candidate beyond this:
Note: WISCONSIN PARTY RULES- Adopted 2015.
National Convention Delegates are bound by the results of the primary unless either released by the candidate or the candidate fails to receive at least 1/3 of the total votes cast in any vote for nomination. [Article X Sections 3. and 4.]