U.S. President Joe Biden unveiled his $2 trillion infrastructure plan on Wednesday that he said is "the largest American jobs investment since World War Two."

"It's big, yes. It's bold, yes. And we can get it done."

Speaking at a carpenters' training center in Pittsburgh, Biden said his plan is designed to modernize and strengthen America's infrastructure with new railroads, thousands of miles of new roads, new bridges and updated airports.

"The American jobs plan will modernize 20,000 miles of highways, roads and main streets that are in difficult, difficult shape right now. It'll fix the nation's 10 most economically significant bridges in America that require replacement. American Jobs Plan will build new rail carters and new transit lines, easing congestion, cutting pollution, slashing commute times."

The plan also earmarks $100 billion in broadband internet investment over the next eight years.

Biden's idea to pay for the plan with higher corporate taxes faces hurdles in Congress from Republicans who say it will kill jobs.

And some of his fellow Democrats want a bigger write-off for state and local taxes.

"No one making under $400,000 will see their federal taxes go up, period. This is not about penalizing anyone. I have nothing against millionaires and billionaires. I believe in American capitalism... We're going to raise the corporate tax. It was 35%, which was too high. We all agreed five years ago it should go down to 28% But they reduced it to 21%. We're going to raise it back to 28%. No one should be able to complain about that."

Some economists have said the massive infrastructure plan would create millions of jobs, undoing some of the economic damage inflicted by the health crisis, with lower middle-income workers and minorities possibly benefiting the most.

Biden - a self-described union man - said part of his proposal includes the right to unionize.