Why this risky, unprecedented move could be the circuit breaker the Democrats needed

President Joe Biden’s decision to step aside as the Democratic nominee in this year’s presidential election certainly had a sense of inevitability about it.

Yet, it is still unprecedented in the modern era for a sitting president to drop out of a presidential race this late in the process. We are really in uncharted waters for American politics.

So, how where does the race go from here – and what does it mean for both the Democrats and Donald Trump, the Republican nominee?