UPDATED: Saturday, November 9, 2013 - 6:30pm
(CNN) — Democratic state Sen. Wendy Davis's formal Texas gubernatorial campaign kicked off with the filing of campaign documents Saturday, the first day she was able to do so.
According to CNN affiliate KVUE, Davis and her likely Republican opponent, state Attorney General Greg Abbott, each filed campaign paperwork in Austin.
Davis is seeking the Democratic nomination to replace Republican Gov. Rick Perry, who has said he will not seek a fourth term. There is speculation that Perry will instead make another bid for the White House in 2016 after his 2008 campaign imploded.
The Texas Secretary of State lists November 9 as the first day for primary filing in the state, with the period running through December 9.
Davis first announced her intentions to seek the governor's office at the beginning of October.
"All of you deserve to have your voices heard. Because our future is brightest when it's lit by everyone's star," Davis said at the time. "That's why today, I am proud to announce my candidacy to be the 48th governor of this great state."
Davis is riding a wave of liberal popularity after her June filibuster against a Texas abortion bill gained national attention. Davis managed to temporarily block passage of the law that later passed in a special session and is currently facing a legal challenge.
Davis has so far established her campaign based around issues such as accessible health care and education.
Her opponent has built a reputation as a staunch conservative. First elected Attorney General in 2002, Abbott has defended socially conservative causes during his tenure. These include pushing for the display of a Ten Commandments monument of the grounds of the Texas Capitol in 2005.
Abbott also has sued the Obama administration more than 25 times, including the case that led to the landmark Supreme Court decision on the Affordable Care Act, or Obamacare, last year.
Despite her name recognition, Davis faces an uphill battle for the governorship in a deep red state Mitt Romney carried 57% in 2012 to President Barack Obama's 41%. No Democrat has won the state's highest office since Ann Richards did so in 1990.