AI:

"Based on various factors such as state politics, demographics, and historical trends, I think that the proposal to codify automatic secession on every general election ballot, unless 75% of the voters vote to remain in the union, is most likely to be seriously considered in the following American state legislatures:

1. **Texas**: Texas has a strong tradition of independence and has previously considered secession. In 2016, the Texas Republican Party's convention delegates voted to include a plank in the party's platform that called for a non-binding referendum on secession.

2. **Alaska**: Alaska has a history of independence and has previously considered secession. In 2014, a ballot initiative was proposed that would have allowed Alaska to secede from the United States, but it did not pass.

3. **Vermont**: Vermont has a strong tradition of independence and has previously considered secession. In 2005, the Vermont Legislature passed a resolution that called for the state to secede from the United States.

4. **New Hampshire**: New Hampshire has a strong tradition of libertarianism and has previously considered secession. In 2009, a bill was introduced in the New Hampshire Legislature that would have allowed the state to secede from the United States.

5. **Oklahoma**: Oklahoma has a strong tradition of conservatism and has previously considered secession. In 2013, a bill was introduced in the Oklahoma Legislature that would have allowed the state to secede from the United States.

6. **Utah**: Utah has a strong tradition of conservatism and has previously considered secession. In 2013, a bill was introduced in the Utah Legislature that would have allowed the state to secede from the United States.

7. **Arizona**: Arizona has a strong tradition of conservatism and has previously considered secession. In 2014, a bill was introduced in the Arizona Legislature that would have allowed the state to secede from the United States.

These states have a history of considering secession or have strong libertarian or conservative movements that may be sympathetic to the idea of secession. However, it's worth noting that secession is a complex and contentious issue, and it's unlikely that any state would actually secede from the United States without a significant change in circumstances."