Iowa Republican U.S. Senate candidate Joni Ernst waded back into controversial waters in June when, during a conversation with a conservative radio host, she again discussed impeaching President Barack Obama. In January, Ernst had suggested that “impeachment” should be on the table if the Supreme Court decided against Obama on the question of recess appointments, which it later did. But Ernst walked back her comments on Tuesday after they were reported by Yahoo News and other media outlets, saying she herself was not calling for the second-term president to be removed from office over his power struggle with the Republican-controlled House of Representatives. Now it turns out that impeachment is something Ernst also discussed on a June 27 episode of the "Simon Conway Show." Her remarks on the conservative talk radio program, taped in Des Moines, showcase the tightrope Republican candidates can be forced walk on conservative programs directed at their voter base. Issues seen as far outside the political mainstream, such as impeachment, can quickly become the hot topics of the day in highly charged partisan environments, opening up candidates to awkward and potentially problematic lines of questioning.