Republicans and Democrats agree that American infrastructure desperately needs an upgrade, but they don't agree on how to achieve that.

And it's unlikely they ever will.

Since the campaign and the early days of the Trump administration, there has been hope and even at times optimism that despite all of their differences, Republicans and Democrats could achieve compromise and pass an infrastructure bill.

House Minority Leader Nancy Pelosi, D-Calif., who has long been critical of President Trump, showed early confidence in this, saying at one point that he and Democrats could "quickly pass a robust infrastructure jobs bill." Politico and The Washington Times both named infrastructure as areas of likely bipartisan cooperation in the Trump era.

But that hope has always been far-flung, considering uncompromising ideological differences and differing diagnoses of the problems, and Pelosi has changed her mind.

She released a statement on Monday regarding President Trump's plan – which he has yet to outline in detail – calling it "a Trojan Horse for undermining workers' wages and handing massive tax breaks to billionaires and corporations."

She continues, "House Democrats are eager to join Republicans to strengthen our infrastructure, but the White House and the Republican Congress must stop pushing plans that fail to create good-paying jobs for hard-working Americans."

From what little we know of Trump's plan, he intends to free up capital, approaching infrastructure through investment in public-private business partnerships. The number that has been thrown around is a total of $200 billion in tax incentives over nine years.

Pelosi's objection is presumably the same as criticism that New Republic gave to the plan provided by Trump's campaign. His initially proposed public-private partnerships were to be financed through government bonds and tax incentives. This, the Left argues, gives control over projects to private companies, which are only concerned with making profits and will cut corners. And the less power the government wields over projects, the less those projects will receive Democrat support.

When it comes to measuring potential for compromise, infrastructure is much like healthcare. Both parties agree that the system has problems, but totally differ the source of those problems.

In healthcare, Obamacare is the source of all problems for Republicans. For Democrats the problem is market forces and Trump-caused uncertainty.

In infrastructure, Trump views the public nature of air-traffic control work as an inhibition to modernization.

Pelosi sees it differently, basically denying that there is any problem. "Our nation's airspace is the safest in the world, in no small part because of the exemplary work of our Air Traffic Controllers and aviation safety professionals at the FAA." She calls Trump's plan a "tired Republican" one.

These are long-existing differences between Republicans and Democrats, and if they can't agree on the problems within national infrastructure, then they can't possibly agree on solutions.