TEXAS — The Republican battle for attorney general is shaping up to be the most-watched primary in Texas. Incumbent Ken Paxton is facing challenges from Land Commissioner George P. Bush, former Texas Supreme Court justice Eva Guzman and East Texas Rep. Louie Gohmert.

The race has attracted intense interest due to Paxton's legal problems. Those include a 2015 securities fraud indictment and an FBI investigation over claims by former top staffers that he abused his office to help a wealthy donor.

Paxton's denied wrongdoing in both cases. But Paxton has managed to maintain a lead in recent polling despite the legal troubles.

In an interview on Capital Tonight, Bush said he expects that to change.

“His support is softening. My support is strengthening,” Bush said. “Progress is very strong on our side, the endorsements, over 40 law enforcement organizations including the Border Patrol union, I think, speak to the top issue that Texans talk to me about and that's law and order.”

All three of Paxton’s challengers have made his legal troubles a key component of their campaigns.

“This is a fire him, hire me election. The three of us are going to talk about his legal challenges wherever we go,” Bush said.

Bush also responded to Gohmert’s recent entrance into the race.

“To me it says somebody who's been in Congress over 20 years leaves his safe seat to challenge an incumbent attorney general. What that says to me is not only is Ken Paxton damaged with the legal challenges he's facing, but it shows Republicans need to hit the reset button,” Bush said.

Bush just returned from a three-day border tour where he met with border officials. Click the video link above to watch our full conversation with Bush, including his plans for the border — if elected.