Skeptical of political promises.
An example of skeptical is someone who doesn't believe in religion.
My teacher was skeptical when I told her my dog ate my homework.
I can see why people are so skeptical [sic] about him, but I think he's on to something here. (regarded by organizations such as the BBC as an err)
She turned in time to see Mrs. Watson's skeptical look turn into a smile.
"I'll admit, we're skeptical. Andre was Andre. No one questioned him," Kiki said at last.
The doctors still said they expected him to wake up any day, but Carmen was skeptical about how much they believed it.
Molly appeared skeptical while the others exchanged knowing looks with each other.
"You're saying she's allergic to us?" a skeptical blonde woman with striking blue-green eyes asked.