Sen. John Cornyn, R-Texas, had the "worst week in Washington," according to Chris Cillizza and the Washington Post. Cillizza says Cornyn, head of the National Republican Senatorial Committee, has been riding high since 2010. He was in charge of his party’s Senate campaign operation when Republicans gained six seats that year.

But, the honeymoon ended this week with the news that Sen. Olympia Snow, R-Maine, would retire. The worst part about her retirement: she, according to Cillizza, would have been a shoo-in win for Republicans, as she is "the most popular elected official in the state." Snow decided not to run for a fourth term because she said she did not like how polarized Washington has become.

The Post also cites the decision by former senator Bob Kerrey to run again in Nebraska. Cillizza calls Kerrey "the only Democrat with a fighting chance of winning in the ruby-red Cornhusker State."

Since John Cornyn is in charge of electing enough Republicans to take control of the U.S. Senate, Snow and Kerrey made that job difficult this week. That’s why this was a bad week for the Texas Senator.