A group of Democratic senators is pushing President Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE to include "Buy American" and "Hire American" proposals in his long-awaited infrastructure plan.

In a letter to the president dated Friday, nine Democrats and Sen. Bernie Sanders Bernie SandersNYT editorial board remembers Ginsburg: She 'will forever have two legacies' Two GOP governors urge Republicans to hold off on Supreme Court nominee Sanders knocks McConnell: He's going against Ginsburg's 'dying wishes' MORE (I-Vt.), who caucuses with the Democratic Party, argued Trump must include these principles to deliver on his promises to American manufacturers and the middle class.

“As you draft your infrastructure proposal, we encourage you to not only protect existing ‘Buy America’ laws, but to work with Congress to expand these protections and address coverage gaps,” the lawmakers write.

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“In addition, no infrastructure proposal should allow circumvention of current requirements in federal law that ensure our public infrastructure is built with American-made iron, steel, and manufactured materials by workers who are paid a fair wage.”

Sens. Tammy Baldwin Tammy Suzanne BaldwinKeep teachers in the classroom Cher raised million for Biden campaign at LGBTQ-themed fundraiser Democrats seek balance in backing protests, condemning violence MORE (D-Wis.) and Brian Schatz Brian Emanuel SchatzVideo of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral Democrat on Graham video urging people to 'use my words against me': 'Done' Polls show trust in scientific, political institutions eroding MORE (D-Hawaii), who sit on the Senate Commerce, Science and Transportation Committee, both signed the letter. The other signatories are Sens. Chris Murphy Christopher (Chris) Scott MurphyDemocratic senator calls for 'more flexible' medical supply chain to counter pandemics The Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon GOP chairman to release interim report on Biden probe 'in about a week' MORE (D-Conn.), Bob Casey Robert (Bob) Patrick CaseySecond GOP senator to quarantine after exposure to coronavirus GAO report finds brokers offered false info on coverage for pre-existing conditions Catholic group launches .7M campaign against Biden targeting swing-state voters MORE Jr. (D-Pa.), Elizabeth Warren Elizabeth WarrenGOP set to release controversial Biden report Biden's fiscal program: What is the likely market impact? Warren, Schumer introduce plan for next president to cancel ,000 in student debt MORE (D-Mass.), Sherrod Brown Sherrod Campbell BrownBipartisan praise pours in after Ginsburg's death Emboldened Democrats haggle over 2021 agenda Hillicon Valley: Russia 'amplifying' concerns around mail-in voting to undermine election | Facebook and Twitter take steps to limit Trump remarks on voting | Facebook to block political ads ahead of election MORE (D-Ohio), Debbie Stabenow Deborah (Debbie) Ann StabenowOVERNIGHT ENERGY: Trump rollbacks could add 1.8 billion tons of greenhouse gas emissions over 15 years: analysis | Intensifying natural disasters do little to move needle on climate efforts | Experts warn wildfire smoke could worsen COVID-19 GAO report finds brokers offered false info on coverage for pre-existing conditions Democrats back away from quick reversal of Trump tax cuts MORE (D-Mich.), Jeanne Shaheen Cynthia (Jeanne) Jeanne ShaheenSenate Democrats introduce bill to sanction Russians over Taliban bounties Trump-backed candidate wins NH GOP Senate primary to take on Shaheen Democratic senator urges Trump to respond to Russian aggression MORE (D-N.H.) and Jeff Merkley Jeffrey (Jeff) Alan MerkleyThe Hill's Morning Report - Sponsored by The Air Line Pilots Association - Trump, Biden renew push for Latino support Sunday shows - Trump team defends coronavirus response Oregon senator says Trump's blame on 'forest management' for wildfires is 'just a big and devastating lie' MORE (D-Ore.).

Trump has long promised to include “Buy American, Hire American” proposals in a plan to rebuild America’s roads, bridges and transit systems, even expressing support last year for Democratic legislation that would increase federal requirements to use American-made iron and steel in some drinking water-infrastructure projects.

But the senators point out that a report Trump detailed during a trip to Wisconsin last April to sign his "Buy American, Hire American" executive order was due in November and has yet to be finished.

“We urge you to expedite its completion and publicly share its findings with fellow supporters of ‘Buy America’ policy in Congress in order to achieve our shared goals,” the lawmakers write.

"Buy American" supporters are worried that the Trump administration’s infrastructure plan puts too much emphasis on states and local governments raising their own funds, which would not be subject to federal "Buy American" standards.

Trump is expected to discuss the administration’s infrastructure proposal during Tuesday’s annual State of the Union address, with a plan soon to follow. But a leaked memo purporting to include the administration’s principles suggests half of the plan's appropriations would go toward an incentive program to promote private and local investment in projects through grants. A quarter of the appropriations would be for a program dedicated to promoting investment in rural areas.

The president said last week he would discuss a $1.7 trillion infrastructure package during his speech in front of Congress. The White House has proposed using $200 billion in federal money for an infrastructure plan that would garner private and local investment for an overall package of $1 trillion.