It's much the same on the Republican side. Fewer than half of leaned Republicans feel they know a good deal about any of the leading candidates' positions -- 44 percent say so about McCain, 38 percent about Giuliani and just 14 percent in Romney's case.
That's not entirely for lack of interest. It remains high, with 66 percent of Americans overall saying they're following the campaign at least somewhat closely. That's about the same as in February, much higher than in the early stages of the 2000 or 2004 contests.
In terms of candidate standings, this poll finds no significant change among Democrats, regardless of heavy coverage of Obama's fundraising prowess; and among Republicans a decline in Giuliani's support from its February level, with McCain stable despite his own fundraising difficulties.
Giuliani is supported by 33 percent of leaned Republicans in this survey, down from 44 percent in February and back to where he was in January. Part (but not all) of that is because of the inclusion of possible candidate Fred Thompson, a former senator and current television actor; removing Thompson from the equation, Giuliani has 37 percent support.
With Thompson included, McCain gets 21 percent support, the same as in February; Romney, 9 percent; Thompson, 9 percent; and Newt Gingrich (who, like Thompson, has not announced his candidacy) 6 percent, down from 15 percent. Others are in the lower single digits.
For the Democrats, support levels are very similar in this poll to what they were in February. Thirty-seven percent support among leaned Democrats for Clinton, 20 percent for Obama, 17 percent for Al Gore (not an announced candidate) and 14 percent for Edwards, with others in single digits.
With Gore excluded, it's 41 percent for Clinton, 25 percent for Obama and 17 percent for Edwards, again very similar to the last ABC/Post poll.
While there's been speculation that Clinton is vulnerable among Democrats most strongly opposed to the Iraq War -- she voted to authorize the use of force -- that doesn't seem to be borne out.
Her support levels are essentially the same among leaned Democrats who strongly disapprove of the war and of the way Bush is handling it. (Of course, those strong war disapprovers account for most leaned Democrats, 76 percent.)
Overall, Democrats remain more satisfied than Republicans with their options -- 80 percent of leaned Democrats describe themselves as satisfied with their choice of candidates, compared with 65 percent of Republicans.
And Clinton, the Democratic leader, has 59 percent "strong" support in her party, compared with 45 percent "strong" support among leaned Republicans for Giuliani.
The Democrats may also take some hope from recent trends in political affiliation.
As reported in an April 16 analysis of other results of this poll, self-identified partisanship has shifted from an even split between Democrats and Republicans in 2003 to a four-point Democratic edge on average from 2004-2006, widening to a 10-point Democratic advantage so far this year.
Nonetheless, plenty of Republicans have overcome that kind of gap to win the presidency in past years.
This poll also tested issues involving cancer and the candidates, and finds some possible impact, but not much.