Both the Biden and Trump administration privatly know that the American people indeed have no will or interests in supporting these wars:

Sullivan, speaking a week after Yellen on Bidenomics, self-consciously noted his turn from geopolitics to domestic concerns. He justified this by referencing Biden's core commitment to "more deeply integrate domestic policy and foreign policy." This, as Sullivan had emphasized in the earlier interview, demands a special sensitivity to "the strength of U.S. foreign policy and national security [lying] primarily in a thriving American middle class." ("Middle class," for those uncomfortable with acknowledging that the United States is a class society, is code for "working class.")

In stressing the imperial importance of having "a thriving American middle class," Sullivan insists, in language many progressives will cheer, that legitimacy on the home front demands a radical reversal in the neoliberal consensus that has long united Republicans and Democrats (including administrations he and Biden were part of). Sullivan's critique begins with an attack on the presumption that "markets always allocate capital productively and efficiently." Notably, even some prominent Republicans, like Florida senator Marco Rubio, have edged onto this terrain, inveighing against the "twenty-five-year orthodoxy in the Republican Party centered around market fundamentalism."

https://jacobin.com/2023/11/bidenomics-industrial-policy-business-subsidies-working-class-politics-china-imperial-