Sept 20 (Reuters) - A tentative labor deal with General Motors Co sends a clear signal to Ford Motor Co and Fiat Chrysler that Canada's autoworkers union is determined to secure new investment in local plants, the union's president said on Tuesday.

DALLAS (Reuters) - Former U.S. President George W. Bush on Tuesday entered the debate over the Trans-Pacific Partnership, hosting a forum at his presidential library extolling his successor's Asian free trade deal.

September 20 (Reuters) - Reuters U.S. sports schedule at 2:30 PM ET on Tuesday:

TORONTO, Sept 20 (Reuters) - Oil company Enbridge Inc's Northern Gateway pipeline project will not appeal a recent Canadian Federal Court of Appeal decision that reversed its approval pending consultations with aboriginal groups, it said on Tuesday.

(Reuters) - Tim Finchem says he regrets that the PGA Tour has not expanded more globally during his long tenure as commissioner, while at the same time he is confident that golf has cemented its place in the Olympic Games.

BRUSSELS, Sept 20 (Reuters) - Thousands of protesters marched through Brussels on Tuesday to demand the European Union abandon planned transatlantic free trade deals they say will worsen labor conditions and allow big business to challenge governments.

TORONTO, Sept 20 (Reuters) - Oil company Enbridge Inc's Northern Gateway pipeline project will not appeal a recent Canadian Federal Court of Appeal decision that reversed its approval pending consultations with aboriginal groups, it said on Tuesday.

Sept 20 (Reuters) - A massive leak of contaminated water through a sinkhole at a Mosaic Co fertilizer facility in Florida will cost it $20 million to $50 million to fix, a company executive said on Tuesday.

(Reuters) - Chinese antitrust regulators approved Marriott International Inc's deal to buy Starwood Hotels & Resorts Worldwide Inc , clearing the way for the combined company to become the world's largest hotel chain.