The homeless miraculously disappeared from the streets of downtown Boston for two weeks during the 2004 Democratic National Convention.
The party of 'defending democracy' also had a designated, fenced-in (more or a chain-link cage) protest area that was convenitently out of sight and hearing of Convention delegates and VIP's.
From the cynical Dem perspective of 'never let a good crisis go to waste', the Dems want/need homelessness and illegal immigration as 'crisis' or 'emergency' to grow Government and increase taxes.
Contrary to popular myth, Libs don't "tax and spend" - they spend, then tax. Budget deficits are great excuses and crisis for increasing taxes.
When there are budget deficits, why do Dems layoff teachers, cops, firefighters, and EMT's first? Because nobody will submit to a tax increase to save the job of Government administrators, but they will tolerate tax increases to save front-line personnel.