WASHINGTON — Senate Republicans on Friday panned President Joe Biden's latest infrastructure proposal and were expected to make a revised offer as talks grind toward next week's slipping deadline for progress on a bipartisan deal.

Speaking after the release of a modest May jobs report, Biden made the case for his robust investment package to push the economy past the COVID-19 crisis and downturn, and into a new era.

“Now is the time to build on the progress we've made,” Biden told reporters in Rehoboth Beach, Delaware. “We need to make those investments today to continue to succeed tomorrow.”

Biden was talking again Friday with the lead GOP negotiator, Sen. Shelley Moore Capito of West Virginia, in what the White House characterized as a discussion rather than an exchange of formal proposals.

The White House had been eyeing a deadline early next week as Congress returns from its Memorial Day break to see progress toward a deal and Democrats are setting ground work for a go-it-alone approach. Transportation Secretary Pete Buttigieg has indicated that Biden will look to act without Republican support if there is no consensus.

White House Press Secretary Jen Psaki downplayed any hard-set deadline Friday and said the administration continues to talk to lawmakers from both parties, giving a nod to a group of bipartisan senators who are privately working on possible areas of compromise with the White House.

“There's runway left,” Psaki told reporters at the White House. “We're going to keep a range of pathways open.”

For weeks, the president has been engaged in talks with GOP senators trying to strike a compromise on Biden's top legislative a priority, the big infrastructure investment package. While the two sides appear to have narrowed the price gap between his initial $2.3 trillion proposal and the GOP's $568 billion opening bid, they remain far apart on how to pay for what could be a compromise $1 trillion investment.

Republicans are showing no interest in Biden's latest proposal for a 15% corporate minimum tax rate that would ensure all companies pay something in taxes, rather than allowing so many write-offs or deductions that they contribute zero to the treasury.

A Republican familiar with the talks and granted anonymity to discuss the private assessment said the GOP senators view Biden's latest idea as an unnecessary tax hike.

Instead, Republicans were poised to submit a revised offer when Capito spoke with Biden again Friday, the person said. They will insist on using untapped COVID-19 relief funds to pay for the infrastructure investments, the Republican said. Biden's team has rejected that approach.

Still, neither Biden nor the GOP senators appear ready to call off talks, even as Democrats prepare to use budget rules to pass any big package on their own, without Republican votes.

On Friday, House Democrats released a plan for spending $547 billion over the next five years on road, mass transit and rail projects, a blueprint of their priorities and a potential building block for Biden's broader package.

The proposal from Oregon Rep. Peter DeFazio, the Democratic chairman of the House Transportation and Infrastructure Committee, continues existing programs set to expire and adds key pieces of the larger measure Biden is negotiating with Republicans.

DeFazio's legislation, a reauthorization of surface transportation programs set to expire Sept. 30, doesn't address how to pay for the projects. He called the effort a “once-in-a-generation opportunity to move our transportation planning out of the 1950s and toward our clean energy future.”

In addition to Biden's proposed a 15% minimum tax on corporations — there's no minimum tax now on corporate profits — he envisions additional revenues from increased IRS enforcement. He is seeking roughly $1 trillion in new infrastructure spending.