Former New York Mayor Michael Bloomberg Michael BloombergBloomberg rolls out M ad buy to boost Biden in Florida Democratic groups using Bloomberg money to launch M in Spanish language ads in Florida Bloomberg pays fines for 32,000 felons in Florida so they can vote MORE said voters should demand their 2020 presidential candidates explain how they would execute their policy proposals.

Bloomberg said in a Washington Post op-ed that the next president will likely need to work with a divided Congress and won't be able to make executive decisions about policy for the country.

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"Winning passage of legislation, whatever its details, will require a mix of compromise and cajoling, horse-trading and arm-twisting, favor-granting and trust-building," he wrote. "Yet candidates speak as though the power of the bully pulpit will be sufficient to overcome opponents. It won’t, as recent history makes abundantly clear."

The billionaire said candidates should present execution plans for their legislative proposals that can adjust as needed.

"The presidential aspirants are not short on big ideas," he wrote. "But voters must demand they explain how they intend to move from proposing plans to actually implementing them, including passing them through Congress. Those who dodge the question by speaking of revolution and the bully pulpit aren’t up to the job."

Recent reports have indicated Bloomberg is reconsidering his March decision not to run in the 2020 presidential race, if former Vice President Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE falters.

He would run as a moderate candidate to combat candidates like Sen. Elizabeth Warren Elizabeth WarrenOvernight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds On The Money: Half of states deplete funds for Trump's 0 unemployment expansion | EU appealing ruling in Apple tax case | House Democrats include more aid for airlines in coronavirus package Warren, Khanna request IG investigation into Pentagon's use of coronavirus funds MORE (D-Mass.) from moving the party too far to the left.

Warren has been catching up with Biden in polls, leading him in the recent Quinnipiac University poll by 3 percentage points.

Candidates like Warren and Sen. Bernie Sanders Bernie SandersSirota reacts to report of harassment, doxing by Harris supporters Republicans not immune to the malady that hobbled Democrats The Hill's Morning Report - Sponsored by Facebook - Republicans lawmakers rebuke Trump on election MORE (I-Vt.) are promoting "Medicare for All" plans, that moderate candidates like Biden oppose, which would provide all Americans with health care from a government source.