The day in federal parliament

TODAY IN FEDERAL PARLIAMENT

* The parliament is sitting a four-day week.

* MPs resume debate on the government's overhaul of funding for universities including hikes in course fees and a lower income threshold for repayment of student loans.

* Question time in both chambers at 2pm.

WHAT'S MAKING NEWS

* Malcolm Turnbull and South Korean president Moon Jae-in have discussed North Korea's recent nuclear test.

* Energy provider AGL appears to be ruling out selling or extending the life of the Liddell power station, despite the government declaring that is still an option.

* A clear majority of voters want governments to step in and regulate electricity and gas prices and also boost investment in renewable energy, according to a new poll.

* MPs have begun debating legislation to reduce the corporate tax rate for all businesses to 25 per cent over 10 years, with Labor slamming the proposal.

* Labor will ramp up its attack against cabinet minister Fiona Nash over her citizenship, seeking to block her from procedural duties in the Senate.

* The "yes" side on same-sex marriage is headed for a resounding victory with seven out of 10 definite voters backing a change to the law, a Fairfax/Ipsos poll has found.

WHAT'S ON THE AGENDA

* The House of Reps: MPs resume debate on government bills including changes to funding of universities; company tax cuts.

* Senate: Debate resumes on government bills including for media ownership changes; welfare reforms; regional investment corporation

ARGY-BARGY

* Government spin: We're putting downward pressure on gas and electricity prices, and ensuring the system becomes more reliable, not just today, but in the months and years ahead.

* Opposition attack: The coalition government is now in its fifth year of office. Since the 2013 election have power prices gone up or down?

WHAT THEY'RE SAYING

"I think it appears AGL speaks with forked tongue." - Government backbencher Craig Kelly questions the energy company's commitment to Liddell power station in the NSW Hunter Valley.

TWEETED

@AdamBandtMP: Don't believe the spin: AGL has just given Turnbull the finger. Big time.