Editors’ Note Appended

WASHINGTON, Oct. 27 — Corporate America is already thinking beyond Election Day, increasing its share of last-minute donations to Democratic candidates and quietly devising strategies for how to work with Democrats if they win control of Congress.

The shift in political giving, for the first 18 days of October, has not been this pronounced in the final stages of a campaign since 1994, when Republicans swept control of the House for the first time in four decades.

Though Democratic control of either chamber of Congress is far from certain, the prospect of a power shift is leading interest groups to begin rethinking well-established relationships, with business lobbyists going as far as finding potential Democratic allies in the freshman class — even if they are still trying to defeat them on the campaign trail — and preparing to extend an olive branch the morning after the election.

Lobbyists, some of whom had fallen out of the habit of attending Democratic events, are even talking about making their way to the Sonnenalp Resort in Vail, Colo., where Democrats are holding a ski getaway on Jan. 3.