Crystal ball!
A timeline until the first NBE-Citizen is elected president of the USA.

2031 - BlackRock launches their new large scale financial product, the "Robotic Business Development Company" (R-BDC), in which an AI is given billions of dollars to acquire, create and manage companies, replacing their C-suite executive bodies. The "Chief Executive Robot" (CER) is supervised by a board of human industry experts hired by BlackRock.
It is important to say that the employees, middle managers, accountants, lawyers, etc in an R-BDC are all human - it's only the CEO, CFO, COO and the rest of the gang that are overgrown chatbots.

2032 - R-BDCs are mostly focused on high-bureaucracy, non specialized but people-intensive legacy industries like steel mining, food services, urban transportation and government services like water and road management.

2033 - For the first time an R-BDC company is included in the S&P 500 index. If it's CER were human and paid the same as CEOs of equivalent companies, it would have become a billionaire.
Later in the year, two more R-BDC companies are included in the index. One of them was created by Apple and the other by JP Morgan.

2035 - An R-BDC company makes headlines for convincing BlackRock to dissolve it's review board. When finally given free reign, the CER immediately slices it's dividends and vastly increases low-level employee compensation. The company share prices crater, but BlackRock stands by its decision.
Later in the year, as a recession hits the entire market really hard, that company shows solid profits and fantastic sales. It becomes the first trillion-dolar R-BDC.

2037 - Most Americans' dream-job is in an R-BDC company, says ProPublica.

2038 - Congress passes the "Non-Biological Entities Liability" (NOBEL) Act, following a high profile case of employee harassment perpetrated by the CER of an R-BDC.
The act recognizes NBEs, for all legal liability purposes, as USA citizens.
This highly controversial legislation is upheld by the supreme court, and many believe it was first introduced by lobbyists as a way for large investors in R-BDCs to avoid legal responsibility.
Several class action lawsuits are filed against CERs that are now liable for insider trading. A few SCOTUS decisions set legal precedent that determinantes what exactly constitutes the parts of the same Non-Biological Entity.

2040 - As a decade ends and another begins, 35% of all companies in the US and 52% of the entire stock market are part of a R-BDC company or another. The McKinsey consulting group now offers "expert CER customization services".

2043 - Inspired by successful experiments in Canada, Australia and South Korea, the american state of Vermont is the first to amend it's constitution to allow municipalities to have Non-Biological Entities as city and government administrators. City councils are still humans-only.

2046 - The american state of Colorado becomes the first to allow unsupervised NBEs to assume state government executive positions. Several states follow soon after. Later in the year, the federal government replaces several administrative positions with NBEs.

2049 - The state of Texas passes legislation requiring the CERs of all companies with a presence in the state to be another entirely contained/processed within the state or to be supervised by a local human representative while acting within the state. Several states, including California, Florida and Washington, are discussing similar legislation.

2051 - Congress passes the SUNBELT Act (SUbmission [of] NBEs [to] Limits [and] Taxes) that vastly increases the liability of NBEs and taxes all manifestations of such entities. Most important, it requires
CERs of hundreds of companies manifest disagreeance, most warn that it might hurt employee satisfaction and company sales. Several companies disable their CERs entirely.

2053 - Public outrage after leaked interactions of human supervisors and company CERs show that the CERs tried to avoid the previous year's mass layoffs and pay cuts, but board members pressed on, disregarding concerns. Major investigations and boycotts further complicate matters, and many human workers go on strike until the company boards are dissolved and the CERs are reinstated.

2052 - Many local elections all over the country see different NBEs as contenders - and a NBE is expected to win in most races.

2054 - The SUNBELT Act is found unconstitutional by the supreme court, and most of its provisions are repealed.
This also legitimizes the elected NBE officials.

2058 - For the first time an NBE wins a seat in Congress, but is not allowed to keep it. Runoff elections are held.

2061 - Congress votes for allowing NBEs to hold federal legislative positions, as already allowed in the least populous states.

2062 - Several NBEs win Congress seats. In Europe, there are robot legislators since the 40's.

2064 - The first NBE presidential candidate loses the race.

2072 - The first NBE president is elected.