Over 300 Congressional bills have been passed, most all with bi-partisan support, and sent over to the Senate and what does the Senate do? Nothing, they sit on them and will not allow them to come up for a vote. And you ask which party causes the gridlock? Wow. Dumbasses vote Democrat and there is no shortage of dumbasses that also vote Republican but the gridlock in DC is 100% Democrat. Democrats rely on Low and No information, naive and gullible "voters".