Pierson said that Sessions "didn't really actively engage" the public on Obamacare, unlike Sen. Ted Cruz (R-TX).
"They sat in Washington, DC, with the bureaucrats and kicked the can down the road," she said, criticizing Sessions for not continuously pushing for a full repeal.
She said that repealing Obamacare should be the main focus for Republicans.
"At what point are we going to say that this lawlessness has to stop," she said. "Obamacare should be the tool that we use moving forward to govern all policy considering how, not only does it affects our debt, it affects the Constitution and it affects the citizens, considering how my state finds the amnesty discussion to be pretty darn important, and the simple fact that these folks are exempt from any of these fees is going to cause a humungous burden on our state even further."
A spokesman for Sessions fired back at Pierson in a statement to the Dallas Morning News on Monday.
“Pierson is frustrated because the voters of the 32nd District aren’t interested in her dishonest campaign. Pete has stood firmly against Obamacare and he was a successful leader in removing Nancy Pelosi from power," spokesman Pete Harvie said. "Folks in the district know this very well and are appreciative of his conservative leadership that gets results.”