"Voters may not trust DeLay keep his promise to resign."
The only reason why DeLay would have trouble beating Lampson is because he resigned from his seat and moved to Virginia; if voters thought he would *not* resign upon winning, it might actually increase his vote total. Besides, if DeLay is still a Virginia resident in November and votes in Virginia, he would be *ineligible* to represent Texas in the House, so voters wouldn't need to rely on his word.