With the prolonged fight over the post of House speaker consigned to the history books, Republicans in the chamber are planning an ambitious agenda of investigation and legislation covering a range of issues — from the migrant crisis and the botched withdrawal from Afghanistan to Hunter Biden’s overseas business interests and the origin of the COVID-19 pandemic.

“If you’re like everybody else we hear: whether you can afford it, whether you feel safe, the challenge of your children getting left behind, or a government that’s run amok, who has a plan to change that course? We do,” Rep. Kevin McCarthy (R-Calif.), who was elected speaker Saturday morning, said in September as he laid out the House GOP’s plans in what he dubbed the “Commitment to America” — a clear echo of former House Speaker Newt Gingrich’s “Contract with America” from the 1994 midterms.

Here’s a look at what Republicans plan to do in the next two years:

The very first piece of legislation Republicans hope to vote on later Monday would roll back $72 billion in new funding for the Internal Revenue Service contained in the so-called Inflation Reduction Act passed last year.

The bill would specify that the IRS only spend new money on customer service and IT improvements, rather than hiring 87,000 IRS agents, auditors and other staff — whom Republicans say will target low- and middle-class Americans rather than wealthy individuals and corporations.

Following The Post’s expose in October 2020 about the first son’s overseas business dealings, Republicans have been eager to investigate whether President Biden was involved or benefited from the relationships. Hunter Biden is already facing federal probes, and Comer, who will head up the House’s examination, has said he believes the entire Biden family was involved, constituting a national security threat.

House panels plan to interview US medical officials, including former White House medical adviser Anthony Fauci, under oath about whether they believe COVID-19 was man-made and whether it leaked from a lab in Wuhan, China, during taxpayer-funded “gain of function” experiments.

The investigations will also focus on how trillions of dollars in COVID-19 relief aid was spent and how school closures pushed by government officials and teachers unions affected students.

Rep. Jim Jordan (R-Ohio), incoming chair of the House Judiciary Committee, has already started the process of putting Google, Apple, Meta, Twitter and other mammoth tech companies on notice about whether they colluded with the Biden administration to censor conservative users and whether they suppressed information — including about Hunter Biden and the coronavirus — from their platforms.

“We have a duty to get into these agencies and look at how they have been weaponized to go against the very people they are supposed to represent, how they have infringed on First Amendment liberties of the American people. And we’re going to do that,” the Ohio Republican said on “Fox News Sunday” over the weekend.

Incoming House Oversight Committee Chairman James Comer (R-Ky.) has already sent letters to the Biden administration and several government agencies ordering them to preserve records and other documents on the August 2021 pullout.

Of particular interest is how the Taliban were able to quickly overrun the country, the planning behind the evacuations from Hamid Karzai International Airport outside Kabul and the failure to ensure that all Afghan refugees were relocated before the pullout.

Republicans plan to investigate the FBI’s rationale for raiding former President Donald Trump’s Florida estate in August 2022 in search of classified documents he kept there after leaving the White House.

McCarthy said House Republicans want to look into the work of the House select committee examining the 76-year-old Trump’s role in the Capitol riot and scrutinize the facts behind the panel’s conclusions. Republicans will also delve into why security was so lax when a mob of Trump supporters stormed the Capitol.

Republicans will look at slicing the budgets of several federal agencies to reduce the country’s $32 trillion debt, including putting the Defense Department on the chopping block. 

“We got a $32 trillion debt. Everything has to be on the table. We’re on pace to spend $500 billion, $600 billion in debt payments in just to deal with interest payments on servicing that debt,” Jordan said Sunday. “Everything has to be on the table.

“And frankly, we better look at the money we send to Ukraine as well and say, ‘How can we best spend the money to protect America?’ I think that’s what the people elected us to do. That’s what we’re going to do.”