President Trump says if the Democrats get in, we will end up in a financial depression...they're grossly incompetent.
There's a real argument about continuity on projects with long lead times. Look at what's actually mid-construction: a $15 billion steel plant in Iowa that pours its first steel in 2030, the first new American iron ore mine in fifty years that just opened in Minnesota, eight nuclear reactors ordered with $120 billion of Korean capital, a 6.4 gigawatt gas plant in Texas.
All of it depends on investors believing the policy environment that made the math work will still exist in four years.