LOS ANGELES (AP) — An onstage moment from Thursday night’s Democratic debate has sparked a Twitter back-and-forth between President Donald Trump’s former spokeswoman and Joe Biden. The former vice president imitated a stutter as he related a tale of how he connects with people as he campaigns. Afterward, former Trump press secretary Sarah Sanders seemed to imitate a stutter on Twitter. Sanders followed up with a tweet saying she wasn’t making fun of anyone but “pointing out I can’t follow much of anything Biden is talking about.” Biden tweeted in response, “I’ve worked my whole life to overcome a stutter” and encouraged “empathy” to understand those who have experienced the same.