u cant its random the newest poll whatever it is shows up on the portal...u can just create a poll and its random whatever comes there lets here zoom on this
The POLL shown on the Portal Page is the Latest Poll posted in the recognised forums as per the poll module! i.e. Not all forums are recognised or qualify to show its POLL on the PORTAL Page... Because.. rather especially, Chit-Chat Lounge Poll are barred from Portal Page Display. Hence, if your posted POLL is in the allowed Forums, the POLL would automatically be shown up on the Portal Page! Now, which are the allowed forums is a thing you should figure out.. cos, i dont want to see a rush for getting their POLL on the main page REgards, Zooom..!!