can a us citizen hold a british passport and still remain a us
citizen, with a us passport?

<Whether or not you can hold a British passport and still remain a
U.S. citizen with a U.S. passport will depend on how you acquire your
British nationality. In most circumstances the acquisition of a second
nationality will not affect your right to hold a U.S. passport. For
example your U.S. citizenship will not be affected if your British
citizenship is acquired by marriage or by birth. However if you
voluntarily applied for British citizenship, with the intention to
give up U.S. citizenship, then you might lose your U.S. citizenship.
In addition there are a list of circumstances where you could lose
your U.S. citizenship. These are covered in section 349 of the
Immigration and Nationality Act (a full transcript of this act can be
read by following the link given below). They are as follows:

1. obtaining naturalization in a foreign state.
2. taking an oath, affirmation or other formal declaration to a
foreign state or its political subdivisions (if for example you were
to join British HM forces and swear an oath of allegiance to Her
Majesty the Queen this could be grounds for losing your U.S.
citizenship);
3. entering or serving in the armed forces of a foreign state engaged
in hostilities against the U.S. or serving as a commissioned or
non-commissioned officer in the armed forces of a foreign state;
4. accepting employment with a foreign government if (a) one has the
nationality of that foreign state or (b) a declaration of allegiance
is required in accepting the position;
5 formally renouncing U.S. citizenship before a U.S. consular officer
outside the United States;
6. formally renouncing U.S. citizenship within the U.S (but only “in
time of war”);
7. conviction for an act of treason.

<Additional links:>

<Advice about possible loss of U.S. citizenship and dual nationality.>
<http://travel.state.gov/dualnationality.html>

<Britain usa>
<http://www.britainusa.com/consular/dualnata.asp>

Advice about possible loss of U.S. citizenship and dual nationality.
<http://travel.state.gov/loss.html>

<United States Embassy – dual nationality and loss of U.S
citizenship.>
<http://www.usembassy.org.ec/English/Consular/dual_nationality_and_loss_of_us.htm>

<http://travel.state.gov/dualnationality.html>

<A full transcript of the Immigration and Nationality Act.>
<http://www.fourmilab.ch/uscode/8usc/8usc.html>

<Sec.1481. Loss of nationalityLoss of nationality by native-born or
naturalized citizen; voluntary action; burden of proof; presumptions.>
http://www.fourmilab.ch/uscode/8usc/www/t8-12-III-III-1481.html


<Search strategy:>

<dual nationality>
<://www.google.com/search?hl=en&lr=&ie=ISO-8859-1&q=dual+nationality&btnG=Google+Search>

<lose us citizenship>
://www.google.com/search?hl=en&lr=&ie=ISO-8859-1&q=lose+us+citizenship

<us immigration act>
://www.google.com/search?hl=en&lr=&ie=ISO-8859-1&q=us+immigration+act


<Hope this helps.>