Biden wants to sell infrastructure. His problem: Few buyers.

"We’re talking about billions of dollars modernizing roads, bridges, airports, delivering clean water, high speed internet," Biden said Friday in Ohio, where he also pushed for legislation to bolster the U.S. semiconductor industry.But Democrats in competitive races this cycle say they are focusing more on bread-and-butter issues — efforts to lower housing, child care and insulin costs — when they talk to voters back in their districts.“People are understanding of the issues around infrastructure, but until we see shovels in the ground, I’m not sure people are going to fully see what that investment means,” said Rep. Andy Kim, D-N.J., who called roads, bridges and tunnels the “lifeblood” of his state. Kelly faces a delicate balance over how much to attach himself to Biden and his policies given the president's unpopularity in the state, said Mike Noble, chief of research at OH Predictive Insights, who focuses on Arizona and Nevada politics.“For Mark Kelly, I think the more Joe Biden can stay out of the Arizona Senate race, the better, because Biden’s at a record low job approval number since he’s taken office,” said Noble, who said he thinks a Biden visit to the state could hurt more than help Kelly.While infrastructure polled well in Arizona six to nine months ago, the economy now dominates the list of voter concerns following the spike in gas and food prices, with immigration becoming an increasing focus with the planned lifting of Title 42, Noble said based on his voter surveys. In one survey by his super PAC 90 percent of Latino registered voters in six battleground states supported modernizing infrastructure and about three quarters thought it was important to defeat a candidate who opposed the infrastructure legislation.But the challenge for Democrats will be making it top of mind for voters come November.“All of our signs are that voters like this policy, they like the jobs and the quality of the jobs that it will create and they also liked that it was passed in a bipartisan way and that they’re, I think, ready to reward candidates who supported it and punish candidates who opposed it,” said Ahamed.“How do we make infrastructure, which we know the public is with us on, more salient to their vote in the fall than something you don’t agree with us on?” Shannon Pettypiece is the senior White House reporter for NBCNews.com.Sahil Kapur is a senior national political reporter for NBC News.Scott Wong is a senior congressional reporter for NBC News.