(CNN) President Donald Trump's proposed border wall has drawn the interest of hundreds of companies, but the larger, more experienced firms might not be on board. The deadline to submit proposals for the wall was Tuesday at 4 p.m. ET, and many of the biggest construction and engineering companies are steering clear of bidding for the project altogether. Several companies who otherwise possess the resources and experience to manage and deliver such a large and complex project are staying away from it largely due to concerns about political backlash, according to Dave Raymond, President and CEO of the American Council on Engineering Companies. He told CNN, "in my lifetime, I can't think of a similar experience."