The Log Cabin Republicans (Republican LGBT advocates) declined to endorse the party's presidential candidate in 1992 (Bush), 2004 (Bush) and 2016 (Trump)...except in 2016 a lot of local chapters that reversed the national organization's decision (https://en.wikipedia.org/wiki/Log_Cabin_Republicans#History).
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So....there's a lot of deviating from party lines. Candidates have run on multiple political parties at various times. But presumably, you'll usually get the most support if you run elbows with the side that you agree with most. And feigning political beliefs is possible, but ew.
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You'd be called a RINO or DINO (R/D in name only).
People do that. Arguably, the parties used to be more ideologically diverse than they are now.
For example, the "boll weevils" (conservative Democrats) during the 80s aligned with Reagan on more issues than not. (https://en.wikipedia.org/wiki/Conservative_Democrat#1981.E2....)
The Log Cabin Republicans (Republican LGBT advocates) declined to endorse the party's presidential candidate in 1992 (Bush), 2004 (Bush) and 2016 (Trump)...except in 2016 a lot of local chapters that reversed the national organization's decision (https://en.wikipedia.org/wiki/Log_Cabin_Republicans#History).
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So....there's a lot of deviating from party lines. Candidates have run on multiple political parties at various times. But presumably, you'll usually get the most support if you run elbows with the side that you agree with most. And feigning political beliefs is possible, but ew.