Several GOP senators who initially endorsed a bipartisan infrastructure deal are warning they may ultimately vote against it as it moves through the legislative process, a sign of the daunting hurdles ahead as proponents try to push the massive proposal through the evenly divided chamber by next month.

Initially, 11 Republicans signed off on an outline of the plan, which proposed to pump nearly $600 billion in new spending for "hard" infrastructure and cost a total of $1.2 trillion over the next eight years. Getting the bill through the Senate would require at least 10 Republicans to back the measure -- assuming all 50 members of the Democratic caucus stay united, which is also highly uncertain.

But five of those 11 GOP senators told CNN on Monday that they are not committed to backing the bill, wary of some of the details for paying for the measure that have come to light and expressing misgivings about Democratic leaders' plans to move the narrower bipartisan bill alongside a much-larger Democratic-only bill that would fulfill much of President Joe Biden's economic agenda.

Anyway, who's ready for conservatives to gain control of the US' legislative body and impeach Biden in 2022?