The fact that they went for 40 years without ever holding it meant that they had to compromise on budgets and a vast range of measures. It’s interesting that the critical political function that the GOP excels at, obsessively focusing on judges, is one that doesn’t go through the House. It’s also interesting that a lot of their current anti-democratic focus has its strongest effect in the House. I might be wrong, but I bet the GOP remembers that 40-year run in the wilderness more strongly than Democrats do.
Imagine how Democratic policies would be affected if we couldn’t, for election after election after election, win the House? It would push us towards the centre, and this argument of whether we should compromise and accommodate the racists wouldn’t even be an argument — we’d have to.
During this postwar period of great strife and acrimony the Republicans controlled twice: 1946 to 1948, and as a result of the Ike landslide 1952-1954. They suffered devastating losses in the 1958 midterms. The Democrats lost few seats in 1962. The only significant setback for Democrats until Ronald Reagan ushered in a GOP-controlled Senate for the next six years were the 1966 midterms, the reaction against the Great Society. The insufferable encomia to George H.W. Bush and his putative moderateness failed to mention that to have any seat at the table Republicans had to compromise.
As the two parties sorted themselves in the nineties into voting blocs similar to parliamentary systems, turnover accelerated, which means that the GOP has even less reason to stabilize and why the Democrats have only in the last election cycle paid more than lip service to their left flank. Democrats, however, have a few years to go before they approximate the GOP’s inexorable purism. This won’t stop Beltway types from both-sides-ism, though.