gold, page-25099

Can someone explain to me the implications of the debt ceiling not being risen? A few questions I have is:
1) Why would the Democrats not vote for it? It seems like it's in everyone's interest to rise the debt ceiling despite how much trump has pissed off the democrats.
2) If they don't rise the debt ceiling will the US have to default on its debt?
3) If they do default, I don't believe the government has enough cash to pay of it's debt especially with GDP being so low. Where would they get the money? Printing?
4) What are the implications of a default?

These problems always seem to rise but they delay the process some how (i.e. GFC, Grexit, Monte dei Paschi, DB etc.).