Iowa has passed new voting laws that require specific identification forms at the polls, shorten the period for casting an absentee ballot, do away with straight party voting, and more.

Here is a link to a video produced by Johnson County, Iowa that demonstrates the changes:

Below is a document that hits the high points of the law:

New law high points

...and here is a more comprehensive look at rules for voters under the new laws:

Voter Registration
Election Day Registration
Voting at the Polls - Identification Required
Absentee Voting
Straight Party Voting

...and here is a link to Voter ID Frequently Asked Questions:

Voter ID Law FAQs