Rep. Ileana Ros-Lehtinen of Florida, who is supporting Mr. Roskam, said there are many supposed undecideds who have already made up their minds but are keeping their powder dry to avoid public squabbles.
"We haven't always played smart. We haven't always worked as a team. In some situations we haven't scored any points or won the match," Mr. Roskam wrote. "But I'm here to tell you, we don't have to live this way."