Long-awaited measure contains substantial funding for a wide range of infrastructure categories.

Plan includes target dates for advancing more than $4 billion in infrastructure grants.

In a turnabout, Biden says he didn't intend to imply a veto threat.

Multiyear plan has a $579-billion increase spread over various sectors but legislation is far from final.

Meanwhile, Biden is "encouraged" by bipartisan Senate group's broader infrastructure proposal.

White House calls revised proposal's significant increase "encouraging."

Revised Biden proposal trims price tag to $1.7 trillion from initial $2.25 trillion.

Sen. Shelley Moore Capito (R) says "we're far apart," but Senate Democrat Tom Carper plans May 26 committee vote on $300B-plus highway bill.