To potty train now or wait until after the next one is born?

My toddler just turned 2 in November, and I'm due with number two early February. We were thinking how nice it would be to potty train the toddler before the baby comes. We have just over a month to do it. However, I've heard that toddlers regress when the newborn comes and I'm nervous if we potty train now that he'll start having lots of accidents after the baby comes. Just wondering if anyone has gone through this and what you would recommend as far as timing!