there are very few liberals left in the Democratic party these days, they've all either retired or been expelled for not adhering to the appropriate orthodoxies. Bill Clinton today would be too right-wing to have much influence in today's party...notice how he's been muzzled since the last time he spoke, when he had the temerity actually to say something sensible? JFK might actually fit better in today's "moderate Republican" (a/k/a RINO) camp!
though I suppose I'm just being old-fashioned, since my understanding of "liberal" is based on the intellectual tradition of Adam Smith, Thomas Jefferson, and Martin Luther King, Jr. of individual liberty and (mostly) free markets (with appropriate adjustments for "free riders" and the "problem of the commons"). Clinton's greatest accomplishments were NAFTA and welfare reform, straight up the middle for a liberal.
perhaps I'm just like any other jilted spouse? the party I once loved tossed me aside for someone else.

Democrats today don't care much about individual liberty, they are all about government compulsion instead. They don't care about free markets any longer, everything has to be regulated.
Of course I disparage Democrats for betraying what used to be their core principles. why would that surprise you? As J.R. Houseman used to say, "they
earned it."
Conservatives feel the same way about today's Republican party: Republicans support way too much crony capitalism for any conservative to be comfortable with
them, either.
I'm bereft, alone in the center, as each party engages in a race to see which can become more extreme, the "progressives" on the left, or the radicals on the right.
There aren't many candidates around who merit support either from conservatives or from liberals. that's a key reason why party affiliation has been declining, and "independents" have been increasing in number. The professional politician has taken over in both parties, and operates a continuous fund-raising campaign in a few key core constituencies.
If you aren't an extremist,
you don't agitate,
and you don't donate,
and so neither party has any use for you!