This manufacturing jobs section is a mess on both sides.

1) Harris said the US lost 300,000 manufacturing jobs because of the China trade war. But the US gained manufacturing jobs under Trump, 483,000, before the pandemic; it's now a loss of 164,000, but pandemic-related.

2) Pence then said Obama lost 200,000 manufacturing jobs. That's highly misleading. The losses occurred during the recession he inherited; starting in March 2010, 14 months into his tenure, the number of manufacturing jobs rose pretty steadily. https://fred.stlouisfed.org/series/MANEMP 

3) Pence, like Trump, wrongly suggested Obama said manufacturing jobs were dead or couldn't be created. Obama said some were gone forever, but he also boasted about how many were being created during his presidency.

4) Pence then boasted of a former 500,000-job gain even though it's now a net loss of 164,000.

That's fair. But she didn't explain she wasn't talking about an actual loss from the previous measured level, and I haven't seen good estimates it's 300,000 lost by any measure. https://twitter.com/powerlifteer/status/1314022097690210304