Sen. Lamar Alexander (R-Tenn.). Photo: Alex Wong via Getty Images

In a speech on the Senate floor Thursday, Sen. Lamar Alexander (R-Tenn.) said President Trump’s decision to declare a national emergency to build his border wall was "unnecessary, unwise and inconsistent with the Constitution," and warned the president that Republicans could vote to block the declaration if he doesn't change course, Politico reports.

The big picture: Trump has said he would veto any effort to block the declaration. Nonetheless, Republican Sens. Susan Collins, Lisa Murkowski, and Thom Tillis have said they will be voting in favor of a resolution passed by the House to end the national emergency, leaving the Senate just one vote shy of rebuking Trump. While Sen. Alexander would not commit to being the fourth vote, his request for Trump to reconsider foreshadows a possible groundswell of Republican resistance as the Senate approaches a vote in the next few weeks.

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S&P 500's historic rebound leaves investors divided on future

Data: Money.net; Chart: Axios Visuals

The S&P 500 nearly closed at an all-time high on Wednesday and remains poised to go from peak to trough to peak in less than half a year.

By the numbers: Since hitting its low on March 23, the S&P has risen about 50%, with more than 40 of its members doubling, according to Bloomberg. The $12 trillion dollars of share value that vanished in late March has almost completely returned.

Newsrooms abandoned as pandemic drags on

Illustration: Sarah Grillo/Axios

Facing enormous financial pressure and uncertainty around reopenings, media companies are giving up on their years-long building leases for more permanent work-from-home structures. Others are letting employees work remotely for the foreseeable future.

Why it matters: Real estate is often the most expensive asset that media companies own. And for companies that don't own their space, it's often the biggest expense.

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Dark clouds envelop feel-good Pinterest

Illustration: Eniola Odetunde/Axios

Pinterest set out to be a bright spot in cutthroat Silicon Valley, but now stands to see its reputation forever tarnished by allegations of mistreatment and a toxic culture by women who held senior roles at the company.

Why it matters: Even a company known for progressive policy decisions and successfully combatting hateful and otherwise problematic content isn't immune to the systemic problems that have plagued many tech companies.