Durbin noted that he chaired the platform committee twice and "nobody noticed." Similarly, House Speaker John Boehner (R-Ohio) said last week he has "never read" a party platform.
The Republican presidential ticket has criticized the platform's omitting references to God and dropping language referring to Jerusalem as the capital city of Israel.
Durbin said he is "OK" with the omitted references and said it does not demonstrate a lack of support for religious faith or Israel on the part of President Obama.
"Both parties do this — I'm gonna concede that point," he said, acknowledging that Democrats similarly criticized the Republican platform, upon its release last week, for including anti-abortion language consistent with the party's position for years.
"I will concede Republicans love this country and also are God-fearing; now let's get to the questions, the issues that confront our nation," Durbin said.