Sarah PalinTLC may not renew the hit reality show 'Sarah Palin's Alaska' for a second season despite it being a ratings juggernaut for the channel.

EW reports that Sunday's finale will be the last episode aired of the reality series, which averaged 3.2 million viewers per week. The first episode of the show set a ratings record for TLC, gathering a reported 5 million viewers.

TLC has not yet given a reason as to why it may not air a second season. A source close to the show told PEOPLE that the show "was always planned as a special event, and beyond that there have been no discussions or decisions."

The Daily Mail is saying that another reason for the show not coming back is the possibility of Palin running for president in 2012. If she does decide to campaign for the post, she would need to show her commitment to winning the elections rather than spending her time filming the reality show.