5 stories you need to know today

1. Senior gardaí to march on Leinster House over pay

Senior gardaí will march on Leinster House on Tuesday in the first of a series of actions to secure restoration of their pay to 2008 levels. Members of the Association of Garda Sergeants and Inspectors (AGSI) are protesting against what they say is the lack of meaningful engagement in relation to Garda pay. The AGSI members will not march in uniform but will wear blue and they will be joined by other members of An Garda Síochána who are on leave, as well as members of the Garda Síochána Retired Members Association. Meanwhile, Garda Commissioner Nóirín O'Sullivan has moved to address claims she instructed a barrister to "attack" Garda whistleblower Sgt Maurice McCabe's motivation and character during private proceedings at the O'Higgins commission of investigation.

2. Report shows use of zero-hour contracts by universities

A Government-commissioned report has acknowledged the reliance of some colleges and universities on precarious and zero-hour contracts for employing lecturing staff. The report of an expert group on fixed-term part-time employment in lecturing at third level shows that up to two-thirds of lecturing staff in some higher education institutions are not full-time or permanent. Unions and representative group for college lecturers have seized on the findings as evidence that precarious work is propping up much of the third-level sector. The report, by senior counsel Michael Cush, makes a number of recommendations aimed at providing more working hours for part-time staff. Elsewhere in Education, Students who use online essay-writing services face sanction if caught. As for the final product, our experiment suggests such work is far from guaranteed to pass

3. Donald Trump on Cameron’s comments

Presumed Republican presidential nominee Donald Trump has hit back at his critics by saying he was "not stupid" in response to remarks by British prime minister David Cameron, and rubbishing a newspaper article about his relationship with women. Asked by ITV's Piers Morgan about Mr Cameron's view of his proposal to bar Muslims from the US as "divisive, stupid and wrong", Mr Trump said "it looks like we're not going to have a very good relationship". "Number one, I'm not stupid, OK? I can tell you that right now - just the opposite," he told Morgan. "Number two, in terms of divisive, I don't think I'm a divisive person. I'm a unifier - unlike our president now, I'm a unifier."

4. Sanctions proposed for Ministers who refuse to answer questions

Ministers who refuse to answer Dáil questions posed by TDs could be sanctioned by the Ceann Comhairle under proposed changes to the running of the Oireachtas. The proposals, arising from the work of a cross-party committee on Dáil reform, include the expansion of the Parliamentary Legal Advisor's Office to assist backbench TDs in drafting legislation and give them advice on new Bills coming before the parliament. Wexford TD Brendan Howlin is to run for the Labour Party leadership, having received the support of the majority of the parliamentary party to succeed Joan Burton. Alan Kelly's hopes of becoming the next Labour leader are fading, as an overwhelming majority of the party's TDs believe Brendan Howlin should be the unanimous choice. As the minority Government faces its first week of Dáil business since its formation, the focus among many politicians is on the remaining jobs that Taoiseach Enda Kenny has in his gift to dispense.

5. When the drugs don't work

The World Health Organisation (WHO) estimates that 350 million people of all ages suffer from depression, the leading cause of disability worldwide. In Ireland, it is estimated that one in 10 people (450,000) suffers from depression at any one time, according to support organisation Aware. Depression research has entered a new era with many different personalised treatments currently being tested across the world. Treatments include new medications, electrical and magnetic stimulation of the brain and new bacteria known as psychobiotics.

WEATHER: It will still be warm in the east and midland areas with temperatures of up to 20 degrees but it will be notably cooler in other areas than of late. There is also the prospect of heavy bursts of rain.

Misc

Socks, shocks and schoolwear: when celebrities and fashion collide: Celebrity collaborations with retailers are everywhere, from Alexa Chung's 1980s M&S line to Rihanna's sexy Stance socks

Ireland celebrates its 'adulthood' by putting on a show for the US:  Ireland 100, a three-week festival in Washington, DC, is all about Irish arts 'flexing our muscles', says actor Fiona Shaw

Henry Shefflin throws down the gauntlet to Dublin and Wexford: Kilkenny legend doubts if either team up the task of taking on All-Ireland champions

Fintan O'Toole: A huge tax break for comfortable people: The Government has shown its true colours with its cynical inheritance tax stunt

April was hottest on record, Nasa says: Climate change experts meet in Germany to work on implementing Paris accord