Obama seeks $19bn to boost cyber defences

US plans extensive computer upgrade in wake of damaging hacks

Charge bank bosses, says ex-commissioner

Phil Angelides slams DoJ for failing to prosecute executives

Republicans snub Obama budget

President’s final spending plan falls foul of rancour over debt

US eyes bad conduct in education sector

New enforcement unit to examine marketing and inappropriate loans

Saudis discuss sending troops into Syria

Riyadh weighs setting up safe zone with Turkey and other allies

Syria’s future in its neighbours’ hands

In the Middle East, it is the regional players at the forefront, writes Dmitri Trenin

Voting begins in New Hampshire primary

Trump and Sanders lead in polls as Kasich wins early vote

US hails military exercise in Thailand

Washington scales down war games but keeps army ties with junta

Bloomberg says he is considering 2016 run

Media billionaire’s entry would reshape campaign

Cruz stays strong in New Hampshire

Texas senator still trails Donald Trump in polls, writes Sebastian Payne

Brash Trump tested: New Hampshire 2016

Battle for crown of Republican establishment standard bearer versus Washington outsiders

US immigration: Workers wanted

Builders try to fill labour gap through US citizenship schemes

Trump, Sanders and American rage

The yearning for leaders from the fringes will have profound implications for the US and the world

Obama requests $1.8bn to fight Zika virus

Alarm in the US and elsewhere grows over illness’s spread

US military: Robot wars

‘More money must go to technology to confront China and Russia’