During the Trump presidency, “infrastructure week” became a running joke because there was never a coherent plan to match the periodic messaging campaigns.

The Joe Biden equivalent is bipartisanship week.

Republicans and Democrats in the Senate are continuing negotiations this week on a big spending package for roads, green energy and other supposed Biden priorities. Ten senators—five from each party—reportedly agreed on a $1.2 trillion plan and will now attempt to sell it to their colleagues, so that it can gain the 60 votes required to overcome a filibuster.

But this effort is as doomed as the last bipartisan infrastructure push. What, you don’t remember the last bipartisan infrastructure push? That was when talks between the White House and Republican Sen. Shelley Moore Capito of West Virginia broke down in early June, with both sides accusing the other of intransigence. That’s the natural outcome when two parties fundamentally disagree, and it’s why the ongoing effort at a bipartisan deal is a smoke screen.

The Bipartisan 10 haven’t published their plan—assuming there really is one—but it reportedly includes poison pills that guarantee Democrats won’t go for it and President Biden would probably veto it if it arrived on his desk. One poison pill is a measure that would index the federal gas tax to inflation. This is a sensible idea Congress should have passed long ago. The gas tax has been stuck at 18.4 cents per gallon since 1993, with inflation eroding its ability to raise needed funding for highways.

The problem is that Biden, while campaigning for president, pledged there would be no tax hikes on any American earning less than $400,000 during his presidency. Indexing the gas tax to inflation would be a de facto tax hike, which Republicans would use to pillory Biden for violating a key campaign promise. Everybody in Washington knows this, which suggests any “bipartisan” plan that includes this kind of tax hike is a sham.

The bipartisan plan also includes a mileage fee on electric vehicles, so owners of cars that don’t use gasoline pay something equivalent to a gas tax. That’s another good idea, but it’s as dead as a hike in the gas tax, for the same reason: Biden would violate a campaign pledge, since some EV owners earn less than $400,000. Those two measures could come out of a final bill, but then there would be no financing mechanism to bring in new revenue needed to pay for all the new spending, which is something both parties insist on, in principle.

Tax hikes going nowhere

Biden, of course, wants to raise the corporate tax rate from 21% to 28% to raise some revenue, and he has proposed other taxes on business and the wealthy to cover the cost of much of his agenda. Those tax hikes will go nowhere with Republicans, who consider it a sacred duty to defend the 2017 tax cuts they passed with zero Democratic support. This leaves Republicans backing tax hikes anathema to Biden, and vice versa. Bipartisan talks can go on forever, but they will never become a bipartisan law.