The network, founded by billionaire industrialist Koch brothers Charles G. and David H. Koch, has close ties to Pence, which has helped enable it to exert influence in the White House despite not endorsing President Trump in 2016.

Pence held a private conversation in June with Charles Koch ahead of the group's Colorado Springs seminar with donors who pay $100,000 annual dues to attend network events.

Trump's legislative director, Marc Short, previously headed the Koch-backed Freedom Partners, a chamber of commerce-style advocacy organization with an aligned political fundraising committee.

The Manhattan meeting on Oct. 12-13 will be the first in New York for the Koch donors network. Over two days, the group will focus on "shaping strategy for the upcoming Senate, House, and gubernatorial races, as well as plans to achieve important policy gains in Washington and state capitals across the country," according to a statement.