\begin{table}[htbp] 
\centering 
\caption{\bf Within-Pool Comparisons: Logistic Regression of Winning Primary or General Election on Ideology} 
\label{tbl_appendix_logit_win_prim_genl_33} 
\begin{tabular}{lcccccc} 
\toprule\toprule 
& \multicolumn{3}{c}{Democrats} & \multicolumn{3}{c}{~Republicans} \\ [.05in] 
Sample                 & Coeff.  & Std. Error  &  \# Obs.  & ~~Coeff.  &  Std. Error  &  \# Obs.  \\ [.01in] 
\midrule 
\multicolumn{7}{l}{\textit{Primary Election Winners vs. Others in Pool}} \\ [0.01in] 
All pools              & -0.341 & (0.304) & [2379] & ~~1.287 & (0.238) & [3488] \\ [.01in] 
Safe districts         & -0.859 & (0.372) & [832] & ~~1.985 & (0.443) & [1675] \\ [.01in] 
Competitive districts  & 0.162 & (0.421) & [930] & ~~0.994 & (0.322) & [1570] \\ [.01in] 
\midrule 
\multicolumn{7}{l}{\textit{General Election Winners vs. Others in Pool}} \\ [0.01in] 
All pools              & -0.455 & (0.339) & [1184] & ~~1.623 & (0.347) & [1921] \\ [.01in] 
Safe districts         & -0.914 & (0.368) & [806] & ~~1.852 & (0.464) & [1218] \\ [.01in] 
Competitive districts  & 0.194 & (0.620) & [324] & ~~1.243 & (0.486) & [697] \\ [.01in] 
\bottomrule 
\end{tabular} 
\end{table} 
