(Updated at 1:55 p.m.: Baucus is not attending because of a scheduling conflict.)

Senate Agriculture Chairwoman Blanche Lincoln, D-Ark., is not expected to be at today's meeting with President Obama on climate and energy legislation. Thirteen senators are expected to attend, mostly moderates from both parties, as well as four top administration officials, including Agriculture Secretary Tom Vilsack.

Over the past several weeks, Lincoln has taken bold steps away from the Democratic Party, most recently launching a re-election ad campaign last week that explicitly says she is against cap-and-trade, as well as other key Democratic priorities. She is also a co-sponsor of the disapproval resolution by Sen. Lisa Murkowski, R-Alaska, that would strip EPA's regulatory authority over greenhouse gas emissions. The League of Conservation Voters and the Sierra Club have taken notice and launched attacks against her.

Requests for comment to both Lincoln's office and the White House were not returned by the time this was published.

The meeting is scheduled for 4:30 p.m. today. Notable senators expected to attend include Murkowski and Jay Rockefeller, D-W.Va., who introduced legislation last week that would delay for two years EPA regulation of greenhouse gas emissions of stationary sources.

After the jump, see a complete list of who is expected to attend, according to the White House.

• Energy Secretary Steven Chu
• Interior Secretary Ken Salazar
• EPA Administrator Lisa Jackson
• Agriculture Secretary Tom Vilsack

• Sen. John Kerry, D-Mass.
• Sen. Lindsey Graham, R-S.C.
• Sen. Joe Lieberman, I/D-Conn.

• Sen. Barbara Boxer, D-Calif.
• Sen. Jeff Bingaman, D-N.M.
• Sen. Maria Cantwell, D-Wash.
• Sen. Sherrod Brown, D-Ohio
• Sen. Max Baucus, D-Mont.*
• Sen. Jay Rockefeller, D-W.Va.
• Sen. Susan Collins, R-Maine
• Sen. Judd Gregg, R-N.H.
• Sen. George LeMieux, R-Fla.
• Sen. Richard Lugar, R-Ind.
• Sen. Lisa Murkowski, R-Alaska

*Baucus is not attending because of a scheduling conflict.

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