Which of these issues was not included in the republican party platform in 1860? a: a pacific railroad b: nativist policies c: no extension of slavery d: a protective tariff

I believe, the issues that was not included is B. nativist policies

In 1860 republican party platform, they included:
- The focus on the building of the pacific railroad as the main national economic intetrest
- abolishment of slavery
- Adding protective tariff in order to protect national business
- Impose policies to take care BOTH immigrants and the locals (nativist oppose immigration)

Political forces often influence public opinion.