Utilize the input text as a context reference, choose the right relationship between 'Volker Kauder' and 'chief whip' from the options.
Options: creator, position held, parent organization, stock exchange

Underlining the stakes involved, the party's chief whip Volker Kauder this month vowed to impose sanctions on any dissidents in his ranks -- a threat that may have backfired by antagonising backbenchers.
position held