More Republican senators entered self-quarantine on Sunday after Sen. Rand Paul (R-Ky.) tested positive for the coronavirus.

Why it matters: The Senate is expected to vote Monday on a $1.8 trillion stimulus package intended to curb the economic impacts of the coronavirus. As of Sunday evening, Democrats in the House and Senate had not yet agreed to back the bill as proposed by Republicans.

Despite what you've heard from congressional Republicans over the last decade, there's no limit to how much the government can spend — and that'll become evident as the federal government prepares its "phase three" coronavirus stimulus package.

Why it matters: U.S. government spending is about to skyrocket, with checks going out to individuals, loans being handed to companies and other attempts to stanch the coming economic pain.

The Senate passed the House coronavirus relief bill 90-8 without changes Wednesday, freeing up Congress to focus more energy on passing subsequent legislation that will likely amount to one of the largest emergency spending packages in modern history.

The big picture: The deal, negotiated between Speaker Nancy Pelosi and Treasury Secretary Steven Mnuchin, includes free coronavirus testing — even for the uninsured; two weeks of paid sick and family leave; increased federal funds for Medicaid and food security programs, like food stamps; and increased unemployment insurance benefits.

The House passed a sweeping coronavirus relief package shortly before 1 a.m. EST on Saturday with a 363-40 vote after President Trump declared a national emergency over the virus outbreak.

Driving the news: President Trump endorsed the deal Friday evening on Twitter, prior to its vote in the House.

Senate Majority Leader Mitch McConnell announced Thursday that the Senate will cancel its planned recess and remain in session next week as Congress attempts to pass legislation to mitigate the coronavirus outbreak.

Why it matters: McConnell previously called House Democrats' coronavirus proposal an "ideological wishlist," per The Hill. That package aimed to provide guaranteed paid sick leave for all workers, free coronavirus testing and a $1 billion infusion for unemployment insurance.

Go deeper: Congressional doctor predicts 70 million–150 million U.S. coronavirus cases

The House of Representatives voted 227-186 on Wednesday in favor of a resolution that would limit President Trump's ability to direct military action against Iran without authorization from Congress.

Why it matters: It's a bipartisan rebuke of the president's foreign policy toward Iran that has now been passed in both the House and Senate. The bill, which is expected to be vetoed by Trump, was first introduced in the wake of the president's decision to order a strike that killed Iranian Gen. Qasem Soleimani, bringing the U.S. to the brink of war with Iran.

Out of the 50 largest U.S. cities, only 15 have female mayors. That proportion stays the same when looking at the largest 100 cities: 70% of mayors are men.

The big picture: Women are running for office at every level of government. Although Elizabeth Warren's withdrawal effectively ended the chance of electing a woman to the presidency this year, there's progress elsewhere.

The White House is weighing options to provide financial assistance to U.S. oil producers getting hammered by the price collapse, but the picture is murky right now.

Why it matters: It's a sign of the rapidly worsening conditions for the sector and the Trump administration's scramble to respond to the effects of the coronavirus and falling prices.

Online dating company Match Group will tomorrow publicly support the EARN IT Act, a bipartisan Senate bill to combat online child sexual exploitation, Axios has learned.

Why it matters: Match, the parent company of major dating platforms such as Tinder, is breaking with the internet industry's leading trade group, which worries the bill could open a wedge for law enforcement to crack into encrypted systems, threatening user privacy.