>[Kamala Harris](https://www.theguardian.com/us-news/kamala-harris) will this evening seek to portray [Donald Trump](https://www.theguardian.com/us-news/donaldtrump) as a potential tyrant-in-waiting who wants to jail his political opponents by seizing on his threat to use US armed forces against those [he has branded “the enemy within”](https://www.theguardian.com/us-news/2024/oct/14/trump-military-enemy-within-armed-forces-election-day).

>The US vice-president and Democratic nominee will hone in on the former president’s darkening campaign rhetoric at a rally in Erie, [Pennsylvania](https://www.theguardian.com/us-news/pennsylvania), widely deemed the most crucial battleground state in a presidential race that multiple polls suggest will go down to the wire.

>At the same time, Harris’s campaign is releasing [a new campaign advert](https://www.youtube.com/watch?v=YQnugO8SEx0), titled The Enemy Within, featuring some of Trump’s recent ominous comments about his adversaries and warnings from two former members of his presidential administration about the danger he would pose if elected president again.