Munk leaders' debate tonight to focus on foreign policy issues

Tonight'sMunkdebate on Canadianforeign policy will dig deeper into the issues of security, trade and Canada's place in the world.

A few weeks ago, the Syrian refugee crisis put foreign affairs at the centre of Canada's federalelection campaign, which for weeks had been focusing on economic growth and jobs. If talks conclude successfully later this week, a game-changing Pacific Rimtrade deal could give the Conservatives a feather in their cap heading into the home stretch.

• Conservative promises madeinfederal election campaign
• NDPpromises madeinfederal election campaign
• Liberalpromises madeinfederal election campaign

Here's a summary of what hashappened so far on some of thekey issuesexpected to feature in tonight's debate:

Follow the debate with CBCNews.ca

Conservative Leader Stephen Harper, NDP Leader TomMulcairandLiberal Leader JustinTrudeauface off on foreign policy tonight in the fourth of five election leaders' debates: This one is hosted by theMunkDebates at Toronto's Roy Thomson Hall, starting at 7 p.m. ET.

CBC News will host a specialliveblogfeaturing debate highlights and analysis, at CBCNews.ca/Canada Votes.

TheMunkDebates will offer alivestreamfor the bilingual event, with translation. Tonight's debatewill also belivestreamedonFacebookand carried onCPAC(the Cable Public Affairs Channel) and CHCH.

Climate Change

In just over two months' time, when the United Nations Conference on Climate Change gets under way in Paris, Canada's position may differ significantly depending on who wins the Oct. 19election.The Conservative approach to greenhouse gas emissions has been at odds with the NDP and Liberal approach.

NDP Leader Tom Mulcairreleased more detail Sunday on his party's promisednational cap-and-tradesystem to make big polluters reduce their greenhouse gas emissions. It aims to reduce emissions by 80 per cent by 2050, compared to 1990 levels.An NDP government won't impose that national plan on provinces like Alberta, B.C., Ontario and Quebec that havedeveloped their own systems to control emissions.

• NDP plan to limit greenhouse gases would let provinces opt out
• Canada's action on climate change still 'inadequate': Bob McDonald
• Spin Cycle: Is Tom Mulcair in favour of exporting bulk water?

In this respect, the NDP approach is similar to the Liberal plan, which would work with the provinces to settargets but keepthe mechanisms for reaching them flexible, open to different strategies in different parts of the country.

The Conservativeshavetaken a sector-by-sector approach to emissions targets,but havefacedcriticismfor the length of time it has taken to implementthose sector-specific rules. For example, there arenonational regulations yet to control the country's largestsource of emissions the oil and gas industry.

Syrian refugee crisis

After weeks of pressure, the Conservatives announced they would speed up refugee applications, send more immigration officers to the region and waive the requirement for a UN designation for refugees.

• ANALYSIS |Spin Cycle: Are only 'bogus' refugees affected by federal health cuts?

Immigration Minister Chris Alexander says the government will bring 10,000 refugees to Canada by September 2016 15 months faster than originally promised. The Conservatives have also pledged to bring in an additional 10,000 refugees from Syria in four years.

The Liberals and NDP had already been calling for the government to increase their commitment. The Liberals are calling for 25,000 Syrian refugees to come to Canada by Dec. 31.

The NDP presented a plan for bringing 10,000 refugees to Canada by the end of this year and a total of 46,000 by 2019.

Terror threats

The Conservatives have taken the most hawkish position on international threats. In August, they announced a policy of travel bans to and from "declared" areas with terrorist activities. Conservative Leader Stephen Harper has repeated that his party won't abandon Canada's mission to degrade and destroytheIslamic State in Iraq and Syria (ISIS).

• Toronto 18 ringleader's citizenship revoked under Bill C-24
• Tories propose ban on travel to terrorist hotspots
• ISIS mission: Comparing leaders' positions

The Canadian military is currently involved in airstrikes and training local ground troops.

Mulcair says his partywould withdraw from the combat and training mission on its first day in office if elected. The NDP says the Conservatives have overlooked the importance of anti-radicalization efforts at home. Liberal Leader Justin Trudeau says his party would withdraw from airstrikes,but wouldcontinue to provide humanitarian assistance and train local soldiers to fightISIS.

Trade

The Conservatives say they have the best record on trade because they have signed 39 trade agreements since they've taken office.

• Quebec dairy farmers panicked over Trans-Pacific deal
• Trans-Pacific Partnership could include big dairy concession
• Unifor, autoworkers want Tory candidates to state views on TPP
• Trans-Pacific Partnership: Harper says auto industry won't like it all

The master stroke was supposed to come with the Trans-Pacific Partnership (TPP),which would give Canada access to 11 other Pacific Rim countries, including the U.S., Mexico, Australia and Japan. That agreement is still being negotiated with sticking points including ending supply management for dairy farmers and regional content quotas for the auto industry.

The NDP says itwould fight to protect the dairy and automotive sectors,and are calling for the Conservatives to be more open about what they wouldgive up.

Trudeau says Canada has been able to protect those industries in past agreements, and it should be no different in this case.

Defence

Trudeau says the Liberals would scrap the controversial F-35 fighter purchase plan,and run a new competition to replace Canada's aging CF-18 fleet.

• Justin Trudeau vows to scrap F-35 fighter jet program
• Liberals 'living in a dream world' on F-35 cancellation, Stephen Harper says

The Conservatives say they'll stick with the current plan to eventually sign a contract for purchase of the F-35s,and warn that withdrawing could hurt the domestic aerospace industry.

While Mulcair says the F-35 procurement plan was flawed, he said he would still consider buying thejetonce he reopensthe competition to replace Canada's fighter fleet.

The Liberals say they would maintain planned increases in military spending and reinvest savings from the F-35 program into the renewing the navy's fleet.

The Conservatives have announced they will spend $75 million to expand Canada's special forces, which are currently involved in the training mission against ISIS in northern Iraq.

Canada and the world

Mulcair and Trudeau refer to "restoring" Canada's reputation in the world after a decade of Harper leadership, usuallyreferring to the Conservatives'position on climate change and humanitarian assistance to refugees.

• Canada sets carbon emissions reduction target of 30% by 2030
• NDP's cap-and-trade system would let provinces opt out
• ANALYSIS |Stephen Harper'selection 2015 strategy on climate change

The Conservatives say Canada is one of the most respected countries in the world, according to international polls. Harper says Canada will continue to stand with its allies, such as Israel and Ukraine, against hostile neighbours. He hasmade the point of mentioning Russian President Vladimir Putin in his stump speeches.

Mulcair has previously called Russia's actions in Crimea "criminal." Last year,Russia was ready to bring its nuclear weapons into a state of alert during tensions over the Crimean Peninsula and the overthrow of Ukraine's president, Putinsaid in March.

Trudeau says Canada should work with international partners to respond to aggression in Ukraine.