President Barack Obama is expected to detail an ambitious
domestic agenda in his State of the Union address Tuesday,
including measures on immigration, gun control, climate change
and education.   The speech will open a limited window for Mr.
Obama to accomplish his objectives before the politics of the
2014 and 2016 contests overtake his term. Complicating matters,
the address comes as the threat of spending cuts known as the
sequester dominate the discussion in Washington. Usually, a
president delivers the speech in tandem with releasing his
budget proposal, giving detail to his policies. This year, Mr.
Obama isn't expected to send Congress his budget until mid-
March.  The president has made clear immigration, gun control
and climate change are top priorities. One former administration
official said Mr. Obama in his speech would discuss reducing
greenhouse gases in an effort to address climate change.  What
They Said   Obama administration officials also have signaled
plans to focus on the "bookends" of edu