Competitive primaries happened yesterday in several of the Iowa Senate districts that will determine control of the upper chamber for the next two years. Full results are on this page of the Secretary of State’s website.

My first take on the general election match-ups is below. I still see Democrats favored to hold their majority, with a decent chance of expanding it.

Democrats appear to be in a strong position to hold their Iowa Senate majority, based on a first review of the landscape since the filing period for major-party candidates ended yesterday.  

It’s time for another Bleeding Heartland election prediction contest. No prizes will be awarded, but winners will get bragging rights. Can anyone dethrone American007, overall winner of our 2008 election contest?

Enter by answering the following questions. To qualify for the contest, your predictions must be posted as a comment in this thread by 7 am on Tuesday, June 8, 2010. This isn’t like The Price is Right; the winning answers will be closest to the final results, whether or not they were a little high or low.

1. How many votes will be cast in the Republican primary for Iowa governor? (Hint: about 199,000 Iowans voted in the hard-fought 2002 Republican gubernatorial primary.)

2. What percentages of the vote will Terry Branstad, Bob Vander Plaats and Rod Roberts receive in the Republican primary for governor?

3. What percentages of the vote will Roxanne Conlin, Bob Krause and Tom Fiegen receive in the Democratic primary for U.S. Senate?

4. What percentages of the vote will Rob Gettemy, Mariannette Miller-Meeks, Steve Rathje and Chris Reed receive in the Republican primary in Iowa’s second Congressional district? Remember, if you expect this nomination to be decided at a district convention, make sure your guess has the top vote-getter below 35 percent.

5. Who will be the top four candidates in the Republican primary in Iowa’s third Congressional district, and what percentages of the vote will they receive? Again, keep the top vote-getter below 35 percent if you expect this nomination to go to a district convention. Your possible answers are Jim Gibbons, Brad Zaun, Dave Funk, Mark Rees, Scott Batcher, Jason Welch and Pat Bertroche.

6. What percentages of the vote will Mike Denklau and Matt Campbell receive in the Democratic primary in Iowa’s fifth Congressional district?

7. What percentages of the vote will Matt Schultz, George Eichhorn and Chris Sanger receive in the Republican primary for secretary of state? (I covered that campaign in this post.)

8. What percentages of the vote will Dave Jamison and Jim Heavens receive in the Republican primary for state treasurer? (The Iowa Republican blog has been covering this race from time to time.)

9. What percentages of the vote will State Representative Ako Abdul-Samad and challenger Clair Rudison receive in the Democratic primary for Iowa House district 66? (Click here for background.)

10. What percentages of the vote will Tom Shaw, Stephen Richards and Alissa Wagner receive in the Republican primary for Iowa House district 8? (Click here and here for background. Keep in mind that although Wagner withdrew from the race and endorsed Shaw, her name will remain on the ballot.)

Don’t be afraid to make some wild guesses. You can’t win if you don’t play!

This is also an open thread, so share whatever’s on your mind.

So many campaign stories the past few days, so little time.

After the jump you’ll find lots of links about various campaigns for U.S. Senate, House, governor and state treasurer.