MADISON, Wis.  – October polls show Wisconsin a toss-up between he Harris and Trump tickets for the nation’s presidency. All were within two percentage ooints – so close that statistically nobody knows who was leading.

> October 12 to 14: Harris 48%, Trump 47%. 641 likely voters. Conducted by Redfield & Wilton Strategies. For the newspaper London Telegraph.

> October 12 to 14: Trump 50%, Harris 49%. 803 registered voters. By Patriot Polling.

> October 8 to 9: 800 likely voters. Harris 48%, Trump 48%. By InsiderAdvantage.

> October 6 to 9: Trump 49%, Harris 48%. 800 likely voters. By Fabrizio, Lee/McLaughlin. For candidate Trump.

> October 5 to 8: Trump 50%, Harris 49%. 1,000 registered voters. By Emerson College. For Nexstar Media.

> September 28 to October 8: Harris 46%, Trump 45%. 600 registered voters. By Fabrizio, Lee/McLaughlin. For Wall Street Journal.

> October 5 to 7: Harris 50%, Trump 48%. 450 likely voters. By Research Company.

> October 3 to 7: Trump 49%, Harris 47%. By Quinnipiac University. 1,073 likely voters.

> October 2 to 6: Trump 49%, Harris 47%. 700 likely voters. By Arc Insights. For Fields of Freedom.

Earlier: Wisconsin polls: Harris leading by a hair

Earlier: Most recent Wisconsin poll: Harris over Trump

Polling variables

The precision of a poll deends on variables, mostly  driven by the budgets of sponsors. The larger the sample pool, the more a poll costs. Ranked here by the least expensive first.

> Registered voters.

> Likely voters.

> Subgroups like a regional, county, municipality.

> Subgroups by gender, income, education, religion, media habits.