I'd say to the public at large, the perspective is the house progressives are holding up the infrastructure bill. Manchin and Sinema have done their job voting for the infrastructure bill. Now it's up to the Democratic controlled house.
It's very true, Biden won the presidency, but in the same election the Democrats lost 13 house seats, a governor and 2 state legislatures. If 2020 wasn't a presidential year, the GOP would be crowing about how good they did and the Democrats frowning. 2020 in my opinion was an election which rejected Trump. But not one that gave the Democrats a mandate or endorsed their agenda. It was a total mix bag if one looks at the whole election results.
In fact, only once in our history has a presidential candidate won the popular vote and lost seats in the house. 1884, Grover Cleveland and he barely won the popular vote. Biden joins him. Biden had no coat tails. Biden didn't bring along a single democrat with him in his big 7 million plus vote margin. There were tons of ticket splitters voting for Biden for president, against Trump then voting Republican down ballot. The ticket splitters wanted to be rid of Trump, but apparently didn't want to endorse the Democratic Party.
Now I can understand the Democrats wanting to forget the down ballot results and only look at the presidential. They want to take the presidential as a mandate for them. I'd say it wasn't a mandate for the Democrats, but a mandate to get rid of Trump. If it were a mandate for the Democrats, Biden would have brought along some Democratic house and senate members. He didn't. In 2008 Obama brought along 23 new House Democrats, Reagan brought along 34 new house Republicans, now those elections were closer to having a mandate than losing 13.
Now we'll see what happens next year. Can the Democrats ride the displeasure for Trump in order to keep control of the house and the senate or will the people become upset with the democratic control and give them back to the Republicans. A year out, mixed signals are there also. Much like the 2020 election.