White House officials are aware of the mounting frustration from progressives over Biden’s decision to continue bipartisan talks on a narrow infrastructure proposal — including threats from several Democratic Senators to oppose legislation if robust investments in combating climate change aren’t passed in one of the bills. A source familiar with White House's thinking also said they don't view attacks on centrist Democrats like Sens. Joe Manchin (D-W. Va.) and Kyrsten Sinema (D-Ariz.) — two of the main lawmakers pushing for those negotiations — as “helpful or appropriate.” And one House aide said administration officials frequently end infrastructure conversations with lawmakers and staff reminding them Democrats need to stick together. But Biden and his aides have largely refrained from pushing back on these criticisms publicly. Instead, top aides have been privately reassuring anxious Democrats that they are committed to pushing a reconciliation bill that would contain the other big parts of Biden’s jobs and family plans — including money for eldercare, early childhood and college education, childcare and those provisions addressing climate change.