update 9:40a Thursday: A staff member from the Clinton campaign tells us this isn't an official campaign office that'll open in Lubbock. As referenced below, local Democrats have events planned to rally support for Clinton in the coming weeks.
The Clinton campaign thinks it has a shot at flipping states considered solidly red, including Texas.
A campaign office will open in Lubbock on Sunday, one of many across the state.
Stuart Williams with the group West Texas for Hillary says volunteers will hold events and register voters.
He says he's optimistic for a win in November, even in West Texas.
"Donald Trump's lead is shrinking in many red states, including Texas," he said. "So the writing is on the wall and if Donald Trump doesn't change his tune soon, the Republican Party is going to have a fiasco on its hands."
Trump is leading in Texas by just six points in the latest poll.
Mitt Romney carried the state in 2012 by 16 points.