New polling released Monday -- nationally and in Iowa -- finds Donald Trump squarely in the top tier of candidates, but raises some questions about whether he'll be able to maintain that standing.
Overall, the new national poll from the Washington Post and ABC News finds Trump at the top of the field nationally with 24% support among Republican registered voters, well ahead of his closest rivals, Wisconsin Gov. Scott Walker (13%) and Florida Gov. Jeb Bush (12%).
But there are some signs Trump's Saturday remarks questioning Arizona Sen. John McCain's military service may have been a turn off to some potential voters. The poll, fielded from Thursday to Sunday, found a drop-off in support for Trump in interviews conducted on the final day of fielding. While he earned 28% support during the first three nights of interviewing, that dipped to single digits on the final day.