Paul Manafort sentencing: What does jailing of Trump's former campaign chief mean for president?

Several allegations including Russian collusion could shadow 2020 election season

President Donald Trump speaks during a signing ceremony for an executive order on a "National Roadmap to Empower Veterans and End Veteran Suicide," in the Roosevelt Room of the White House, Tuesday, March 5, 2019, in Washington. ((AP/Evan Vucci))

A look at where investigations related to President Donald Trump stand and what may lie ahead for him:

What's this all about?

Special counsel Robert Mueller is looking into whether the Trump campaign coordinated with Russia and whether the president obstructed the investigation. Mr Trump also plays a central role in a separate case in New York, where prosecutors have implicated him in a crime. They say Mr Trump directed his personal lawyer Michael Cohen to make illegal hush-money payments to two women as a way to quash potential sex scandals during the campaign. New York prosecutors are also looking into Mr Trump's inaugural fund.

Congressional investigations also are swirling around the president. Democrats have launched a sweeping probe of Mr Trump, an aggressive investigation that threatens to shadow the president through the 2020 election season.

What do I need to know right now?

Former Trump campaign chairman Paul Manafort was sentenced Thursday to nearly four years in prison for tax and bank fraud related to his work advising Ukrainian politicians.

The sentence caps the only jury trial so far following indictments stemming from Mr Mueller's investigation. It was not related to Mr Manafort's role in Trump's campaign.

Also Thursday, Michael Cohen's attorney said Trump's advisers had dangled the possibility of a pardon after the FBI raided Cohen's home, office and hotel room in April 2018. That appears to contradict Mr Cohen's public testimony before the House Oversight Committee last week.

Mr Cohen filed a lawsuit Thursday claiming the Trump Organisation broke a promise to pay his legal bills and owes at least $1.9 million to cover the cost of his defence.

So... Did the Trump campaign collude with Russia?

There is no smoking gun when it comes to the question of Russia collusion. But the evidence so far shows that a broad range of Trump associates had Russia-related contacts during the 2016 presidential campaign and transition period, and several lied about the communications.

There is evidence that some people in Trump's orbit were discussing a possible email dump from WikiLeaks before it occurred. American intelligence agencies and Mueller have said Russia was the source of hacked material released by the anti-secrecy group WikiLeaks during the campaign that was damaging to Democrat Hillary Clinton's presidential effort.

Other questions to consider:

What about obstruction of justice? That is another unresolved question that Mr Mueller is pursuing. Investigators have examined key episodes such as Trump's firing of FBI Director James Comey and Mr Trump's fury over Attorney General Jeff Sessions' recusal.

What does Trump have to say about all this? Trump has repeatedly slammed the Mueller investigation as a "witch hunt" and insisted there was "no collusion" with Russia. He also says Mr Cohen lied to get a lighter sentence in New York.

When will it all wrap up? It's unclear. Then-acting Attorney General Matthew Whitaker said in January that the probe is "close to being completed," the first official sign that Mr Mueller's investigation may be wrapping up. But he gave no specific timetable.

AP