The view from across the pond:

Republican John McCain, chairman of the Senate armed services committee, said Mr Flynn’s resignation was a “troubling indication of the dysfunction of the current national security apparatus” and raises questions about Mr Trump’s intentions towards Russia.

Senator Roy Blunt, a Republican member of the Senate intelligence committee, called for an investigation into any alleged connections between Mr Trump and Russian officials.

Texas Senator John Cornyn, the second-ranked Senate Republican leader, echoed calls for an investigation into Mr Flynn’s ties to Russia.

Meanwhile, US House Intelligence Committee Chairman Devin Nunes told reporters on Tuesday he wants to investigate the leaks that led to Mr Flynn’s resignation.

McCain, Blunt, and Cornyn have it right; Nunes has it wrong. Investigate the love affair with Russia, not “the leaks.” The leaks exposed bad, criminal, perhaps treasonous activities. We need the leaks. Trump doesn’t get to do bad shit as long as he can keep it secret. We don’t want him doing bad shit.

Senior Democrat Adam Schiff said Mr Flynn’s departure would not end questions about contacts between Donald Trump’s campaign and Russia.

Congressional democrats John Conyers and Elijah Cummings have demanded a classified briefing to Congress on Michael Flynn by the justice department and FBI.

“We in Congress need to know who authorised his actions, permitted them, and continued to let him have access to our most sensitive national security information despite knowing these risks,” their statement said.

Several House Democrats had already called on Oversight Committee Chairman Jason Chaffetz to launch an investigation into Mr Flynn’s ties to Russia.

And Trump’s, please.