WATCH: Blackford: ‘We need to modernise our defence forces, Trident doesn’t play a part in that’

The SNP’s Westminster leader is asked whether scrapping the nuclear deterrent will be part of their price for putting Corbyn in Downing Street.

Garvan Walshe: How Trump’s blunders give Iran the chance for “nuclear breakout”

The United States’ weakened capabilities and frayed alliances both play in Tehran’s favour at a crucial and sensitive time.

WATCH: May defends Britain’s position as a ‘tier one’ military power

“We will continue to be a leading member of NATO, we will continue to be a leading defence nation, and we will continue to contribute in a whole variety of ways across nuclear, cyber, and conventional capabilities.”

WATCH: Jong-Un’s face – as Trump tells photographers that both men want to look “nice and handsome and thin”

“Very nice…getting a good picture, everybody?…thank you,” the American President concludes.

WATCH: That Trump & Jong-Un handshake

A few small steps for both men, a giant leap for nuclear disarmament and international engagement?

Daniel Kawczynski: We must back Trump’s withdrawal of support from the Iran deal

Obama and his partners ignored the loudly-voiced concerns of our key Gulf strategic partners and Israel that the deal ignored potential Iranian interference in the region.

WATCH: Trump announces that America will withdraw from the Iran deal

“In just a short period of time, the world’s leading state sponsor of terror will be on the cusp of acquiring the world’s most dangerous weapon.”

Garvan Walshe: The IDF’s chief of staff thinks the Iran deal is good enough. Why doesn’t Netanyahu?

The Israeli Prime Minister senses a chance to finally succeed in his years-long campaign to persuade the United States to bomb Iran’s nuclear programme.

Garvan Walshe: The US Congress should stick with the Iran Deal

The deal won’t stop Iran’s nuclear programme for good, but it is still better than alternative, military means of non-proliferation.

Nadhim Zahawi: Our Government should make it clear that Trump is on his own over Iran

The President himself hasn’t set out what he would like to happen next, and has provided no detailed plan for what would replace the current agreement.

John Baron: Trump’s Iran decision has an alarming North Korean dimension

De-certification of nuclear agreement could lead world leaders to conclude that such deals with the United States are not worth the candle.

Garvan Walshe: How to counter thermonuclear proliferation, the true threat posed by North Korea

The policy of preventing Pyongyang becoming a nuclear state has failed. We must now shift to protecting others from that new reality.

Iain Dale: I never thought I’d compare an American President to a North Korean dictator. But here I go.

Plus: UKIP goes nuts. And: Chapman’s tweets might lead you to believe that he’s taken some sort of personality-changing drug.

Rebecca Lowe Coulson: Why the case for nuclear deterrence needs to be made all over again

This is important not only because without arguments we are weak in the face of our adversaries, such as Corbyn, but also because we must keep checking that we’re right.

Rebecca Lowe Coulson: There is more consensus in our politics than we tend to believe

Often, the disagreements between the two old camps are less substantial than the disagreements erupting within each camp’s own tents.