The race between Hillary Clinton and Donald Trump has tightened. Clinton, whose lead over Trump exceeded 8 percentage points at her peak following the Democratic convention, is ahead by 4 or 5 percentage points today, according to our polls-only forecast. The tighter margins in the polls, which reflect a loss of support for Clinton along with a modest improvement for Trump, have come gradually over the past few weeks. The evidence of a tightening has become more widespread, however, and it’s particularly clear in polls that surveyed the race just after the conventions and are retaking its temperature now. Fox News’s national poll, for instance, had Clinton up by 9 points just after the conventions (in the version of the poll that included third-party candidates) and has her up by 2 points now.