A major announcement from Gov. Rick Perry today could mark the beginning of a new chapter in Texas politics.

As reported last week, Perry — the longest-serving governor in Texas history — has invited supporters to join him and his family at an event today in San Antonio at which he will unveil "exciting future plans."

Though he has stayed quiet about the contents of those plans, Perry is widely expected to announce that he will not seek an unprecedented fourth term as governor, likely clearing a path for Attorney General Greg Abbott to succeed him.

Small signs, like Abbott's fundraising edge and little movement inside Perry's campaign apparatus, have suggested that the governor may instead be prepping for another presidential run.