A push-polling campaign with live telephone interviewers is underway in Iowa House district 43, where two-term Republican State Representative Chris Hagenow faces Democrat Susan Judkins. Following my own advice, I took detailed notes on last night’s call.

UPDATE: I am hearing reports of similar push-polls against John Forbes, Democratic candidate in House district 40, and John Phoenix, Democratic candidate in House district 38. If you have received these calls or push-polls targeting other Democratic House candidates, please let me know: desmoinesdem AT yahoo.com. If you get one of these calls, take notes if possible, and don’t be afraid to ask the caller to repeat the question.

SECOND UPDATE: Mark Blumenthal explained the difference between a real opinion survey and a push-poll on his Mystery Pollster blog. Whereas a real poll is designed to collect data from respondents and measure opinions, a push-poll is all about spreading negative information about a political opponent to as many people as possible, under the deceptive guise of conducting a survey.

At this time four years ago, Barack Obama’s campaign had about 30 field offices up and running in Iowa, compared to six offices for Republican presidential candidate John McCain.

Obama’s campaign has had eight Iowa field offices open this summer and is rolling out another 26 offices around Iowa this weekend. So far, Mitt Romney’s campaign has ten Iowa field offices, in addition to the unified Republican headquarters in Urbandale.

After the jump, I compare the field office locations for each presidential campaign, grouped by Iowa Congressional district. Where relevant, I’ve also noted competitive Iowa House and Senate districts near the Obama and Romney field offices, although I doubt either presidential campaign will do much for down-ticket Democratic or Republican candidates.

The redistricting process and several Republican retirements have created many pickup opportunities for Iowa House Democrats. The devastating 2010 election left them nowhere to go but up in the lower chamber, where Republicans currently enjoy a 60 to 40 majority. Relatively few sitting House Democrats represent vulnerable districts.

Speaking to activists at the Polk County Democratic convention on March 10, I heard lots of optimism about the House races. After the jump I’ve posted some early thoughts on the seats up for grabs.