Hillary Clinton's once-imposing lead over presumptive Republican nominee Donald Trump has vanished. Does this mean the November general election is now a toss-up?
Donald Trump has often boasted of running a 'self-funded' campaign. But he has now started to attend fundraisers. So how willing are donors to part with their cash?
James Naughtie looks at the effect Bernie Sanders may have on the presidential election.
Could all those years of Donald Trump saying "you're fired" on reality TV actually get him hired - as president?
How the two sides of America see each other
Did 'socialism' save this conservative town?
Brunch with a Trump supporter and Muslim refugee
Who would be the most progressive president?
Would Cruz or Trump be more radical?
Five reasons why US voters are so fed up