Something all sane Americans would support. My political hot take is all of the political insanity of our country can be boiled down to two grave mistakes - the 17th amendment and the 1960s movements, primarily represented with the McGovern Fraser Commission reforms, on broadening participation in political primaries.
Senators should not be directly elected by people. That's what the House of Representatives was supposed to do. By creating popularly elected Senators, you essentially have a House of Representatives and a Super House of Representatives filled with Senators who are mostly focused on spring boarding to the presidency. About 45% of presidents since the passing of the 17th amendment have been Senators prior to their election, where it was about 1/3 before. It really manifests itself now with a more polarized senate filled with people grandstanding in their official duties to drum up political clout with the base rather than primarily working for the interests of their states as was previously the case. Now you get mockeries of senate hearings where people want to get their good soundbites in rather than ask meaningful questions about legislation or nominees for positions.
Similarly, opening up party primaries to the entire base of party voters, you get candidates for office that are catered towards the extreme wings of the party. When the candidates were chosen in a less-democratic way, you got more pragmatic candidates for public office that the party elite picked that would actually be good representatives of the party and have a good shot at appealing to the moderate electorate. The party primary process lends itself to big tent political parties that are held hostage by the ideological wings of the party that vote in higher percentages at the primaries and don't really have the best ideas of good governance, and you get politicians who would otherwise be willing to compromise and work across the aisle having to vote in more polarizing fashion. If we didn't have open party primaries, somebody like Trump never gets the republican nomination. We would have had Jeb vs. Hillary in 2016, which would have ultimately been much better for our nation. It also strengthens a 2 party system, as there are wings in each of the party that sort of fit the niche that a challenging 3rd party would have been able to fill, challenging the Republican and Democrat parties.