This method deletes the campaign specified by the <code>campaign_id</code> query parameter.<br /><br /><span class="tablenote"><b>Note: </b> You can only delete campaigns that have ended.</span><br /><br />Call <a href="/api-docs/sell/marketing/resources/campaign/methods/getCampaigns">getCampaigns</a> to retrieve the <b>campaign_id</b> and the campaign status (<code>RUNNING</code>, <code>PAUSED</code>, <code>ENDED</code>, and so on) for all the seller's campaigns.