Neither party is actually interested in upholding democracy. Both parties are seeking power for themselves and in their own interests. It's not even in the interest of their supporters, it's solely for the power of the parties themselves.
I find this point of view ridiculous. A typical member of Congress will be motivated by
- Pleasing his or her voters
- Pleasing potential campaign donors
- Serving what he or she views as duty or mission; i.e. doing what is in constituents', nation's or world's interest whether they know it or not.
What portion of motive fits into each of three categories varies from politician to politician. But it is absurdly cynical to assume that all politicians are insincere. Anyone with the talent and ambition to win election would likely have better career choices if money were the primary concern. Some Congresswomen deliberately avoid big-pocketed donors, so that pleasing donor and pleasing voters do not conflict. I especially admire Congressmen who will vote in the nation's best interest, even when voters don't understand that that stance is best.
I honestly cannot imagine where "not even in the interest ... solely for the power of the parties" comes from. GOP Congressmen are going bonzo
because they are worried about re-election. Many feel that bonzosity is NOT in the party's interest ... but that is NOT their motive.
One hears that Democrats support immigration because babies born in the USA will be likely to vote blue when they come of age in 18 years. Balderdash!! These Congresscritters are not Machiavellian nerds plotting 18 years ahead.